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Full vulnerability report · 2026
CVE-2026-45591High confidence

ASP.NET Core Denial of Service Vulnerability

Microsoft · .NET 10.0

7.5HighCVSS 3.1
Recommended action
Within 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Patch available
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityHighOperational priority:High, unchanged from published severity.unchanged

Evidence used

  • No CISA KEV confirmation is currently recorded.
  • The selected CVSS metric records a network-reachable, unauthenticated path with no user interaction.
  • EPSS is 2.44% for the current model date.

Compensating controls

  • Validate the affected product branch and deploy the verified fixed release.
  • Restrict the affected network interface to trusted sources where business-safe.
  • Monitor vendor guidance and exploitation sources for a material change.

Verification

  1. Confirm that the asset runs Microsoft .NET 10.0 and falls inside the recorded affected range.
  2. Verify the installed build against the product-specific fixed version after deployment.
  3. Validate exposure, authentication requirements and compensating controls in the actual environment.
  4. Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Mitigation target: Within 30 daysRemediation target: Within 180 days

This automated reassessment organises public evidence. It does not know asset exposure, business impact or control effectiveness and does not replace CVSS or a human risk decision.

Distribution package intelligence

Release-specific package status

Alpine, ubuntu findings are scoped to the named distribution, release and source package. An absent finding does not mean a package is unaffected.

8 package states
Repository candidate not checked

A published vendor fix does not prove that a matching update is enabled and installable on a particular asset. Confirm the local package candidate before scheduling remediation.

Distribution releaseSource packageVendor stateFixed versionEvidence
Alpine v3.23v3.23 · communitydotnet10-runtimeVendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected.10.0.9-r0Alpine Security Database ↗Source updated 11 Sep 2026
Alpine v3.23v3.23 · communitydotnet8-runtimeVendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected.8.0.28-r0Alpine Security Database ↗Source updated 11 Sep 2026
Alpine v3.23v3.23 · communitydotnet9-runtimeVendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected.9.0.17-r0Alpine Security Database ↗Source updated 11 Sep 2026
Alpine v3.22v3.22 · communitydotnet8-runtimeVendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected.8.0.28-r0Alpine Security Database ↗Source updated 11 Sep 2026
Alpine v3.22v3.22 · communitydotnet9-runtimeVendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected.9.0.17-r0Alpine Security Database ↗Source updated 11 Sep 2026
Alpine v3.21v3.21 · communitydotnet9-runtimeVendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected.9.0.17-r0Alpine Security Database ↗Source updated 19 Aug 2026
Ubuntu 24.04 LTSnoble · standard archivedotnet10Vendor fix publishedCanonical reports that a fixed source package version has been published. Repository candidate availability is not checked by BlackTree.10.0.109-10.0.9-0ubuntu1~24.04.1Canonical Ubuntu Security ↗Source updated 5 Oct 2026
Ubuntu 24.04 LTSnoble · standard archivedotnet8Vendor fix publishedCanonical reports that a fixed source package version has been published. Repository candidate availability is not checked by BlackTree.8.0.128-8.0.28-0ubuntu1~24.04.1Canonical Ubuntu Security ↗Source updated 5 Oct 2026
Open-source package ranges24 source-attributed ranges

These OSV and GitHub advisory ranges apply only to the named package and ecosystem. A listed fixed version is not a universal product patch or proof that an update is installed.

Ecosystem and packageAffected rangeFirst fixed versionEvidence
NuGetMicrosoft.AspNetCore.App.Runtime.linux-x64ECOSYSTEM: introduced 8.0.0; fixed 8.0.288.0.28OSV record ↗aggregator derived · 10 Sep 2026
NuGetMicrosoft.AspNetCore.App.Runtime.linux-x64ECOSYSTEM: introduced 9.0.0; fixed 9.0.179.0.17OSV record ↗aggregator derived · 10 Sep 2026
NuGetMicrosoft.AspNetCore.App.Runtime.linux-x64ECOSYSTEM: introduced 10.0.0; fixed 10.0.910.0.9OSV record ↗aggregator derived · 10 Sep 2026
NuGetMicrosoft.AspNetCore.App.Runtime.osx-arm64ECOSYSTEM: introduced 8.0.0; fixed 8.0.288.0.28OSV record ↗aggregator derived · 10 Sep 2026
NuGetMicrosoft.AspNetCore.App.Runtime.osx-arm64ECOSYSTEM: introduced 9.0.0; fixed 9.0.179.0.17OSV record ↗aggregator derived · 10 Sep 2026
NuGetMicrosoft.AspNetCore.App.Runtime.osx-arm64ECOSYSTEM: introduced 10.0.0; fixed 10.0.910.0.9OSV record ↗aggregator derived · 10 Sep 2026
NuGetMicrosoft.AspNetCore.App.Runtime.win-x64ECOSYSTEM: introduced 8.0.0; fixed 8.0.288.0.28OSV record ↗aggregator derived · 10 Sep 2026
NuGetMicrosoft.AspNetCore.App.Runtime.win-x64ECOSYSTEM: introduced 9.0.0; fixed 9.0.179.0.17OSV record ↗aggregator derived · 10 Sep 2026
NuGetMicrosoft.AspNetCore.App.Runtime.win-x64ECOSYSTEM: introduced 10.0.0; fixed 10.0.910.0.9OSV record ↗aggregator derived · 10 Sep 2026
NuGetMicrosoft.AspNetCore.SignalR.Protocols.MessagePackECOSYSTEM: introduced 8.0.0; fixed 8.0.288.0.28OSV record ↗aggregator derived · 10 Sep 2026
NuGetMicrosoft.AspNetCore.SignalR.Protocols.MessagePackECOSYSTEM: introduced 9.0.0; fixed 9.0.179.0.17OSV record ↗aggregator derived · 10 Sep 2026
NuGetMicrosoft.AspNetCore.SignalR.Protocols.MessagePackECOSYSTEM: introduced 10.0.0; fixed 10.0.910.0.9OSV record ↗aggregator derived · 10 Sep 2026
nugetMicrosoft.AspNetCore.App.Runtime.linux-x64>= 8.0.0, <= 8.0.278.0.28GitHub advisory ↗upstream repository advisory · 15 Jun 2026
nugetMicrosoft.AspNetCore.App.Runtime.linux-x64>= 9.0.0, <= 9.0.169.0.17GitHub advisory ↗upstream repository advisory · 15 Jun 2026
nugetMicrosoft.AspNetCore.App.Runtime.linux-x64>= 10.0.0, <= 10.0.810.0.9GitHub advisory ↗upstream repository advisory · 15 Jun 2026
nugetMicrosoft.AspNetCore.App.Runtime.osx-arm64>= 8.0.0, <= 8.0.278.0.28GitHub advisory ↗upstream repository advisory · 15 Jun 2026
nugetMicrosoft.AspNetCore.App.Runtime.osx-arm64>= 9.0.0, <= 9.0.169.0.17GitHub advisory ↗upstream repository advisory · 15 Jun 2026
nugetMicrosoft.AspNetCore.App.Runtime.osx-arm64>= 10.0.0, <= 10.0.810.0.9GitHub advisory ↗upstream repository advisory · 15 Jun 2026
nugetMicrosoft.AspNetCore.App.Runtime.win-x64>= 8.0.0, <= 8.0.278.0.28GitHub advisory ↗upstream repository advisory · 15 Jun 2026
nugetMicrosoft.AspNetCore.App.Runtime.win-x64>= 9.0.0, <= 9.0.169.0.17GitHub advisory ↗upstream repository advisory · 15 Jun 2026
nugetMicrosoft.AspNetCore.App.Runtime.win-x64>= 10.0.0, <= 10.0.810.0.9GitHub advisory ↗upstream repository advisory · 15 Jun 2026
nugetMicrosoft.AspNetCore.SignalR.Protocols.MessagePack>= 8.0.0, <= 8.0.278.0.28GitHub advisory ↗upstream repository advisory · 15 Jun 2026
nugetMicrosoft.AspNetCore.SignalR.Protocols.MessagePack>= 9.0.0, <= 9.0.169.0.17GitHub advisory ↗upstream repository advisory · 15 Jun 2026
nugetMicrosoft.AspNetCore.SignalR.Protocols.MessagePack>= 10.0.0, <= 10.0.810.0.9GitHub advisory ↗upstream repository advisory · 15 Jun 2026
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Choose official national sources for this report. Each advisory shows its original language. Your selection is remembered on this device and included in shared links.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2026-35549

No EUVD known-exploited evidence

Uncontrolled resource consumption in ASP.NET Core allows an unauthorized attacker to deny service over a network.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
7.5 · CVSS 3.1
Advisory evidence
No linked advisory details stored yet
Recommended actionWithin 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Patch available
01

What, why and how

A flaw was found in ASP.NET Core SignalR and Blazor Server. A remote attacker could send a specially crafted MessagePack payload containing deeply nested arrays that trigger excessive recursion and cause a stack overflow. This issue may result in application termination and a denial of service condition

What

A flaw was found in ASP.NET Core SignalR and Blazor Server. A remote attacker could send a specially crafted MessagePack payload containing deeply nested arrays that trigger excessive recursion and cause a stack overflow. This issue may result in application termination and a denial of service condition

Why

The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may disrupt the affected service.

What

A flaw was found in ASP.NET Core SignalR and Blazor Server. A remote attacker could send a specially crafted MessagePack payload containing deeply nested arrays that trigger excessive recursion and cause a stack overflow. This issue may result in application termination and a denial of service condition

Why

The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may disrupt the affected service.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
a network path → Allocation of Resources Without Limits or Throttling → disrupt the affected service
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
None
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-770 ↗

CWE-770: Allocation of Resources Without Limits or Throttling. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CNoneConfidentiality impact: No direct loss is represented by this metric.INoneIntegrity impact: No direct loss is represented by this metric.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land
No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
NetworkUnauthenticatedDenial of serviceCWE-770
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

ENISA EUVD · EUVD-2026-35549Official EUVD mapping

Uncontrolled resource consumption in ASP.NET Core allows an unauthorized attacker to deny service over a network.

Official EUVD record ↗
BSI · German · WID-SEC-2026-1845Microsoft DeveloperTools: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in Microsoft Visual Studio Code, Microsoft ASP.NET, Microsoft .NET und Microsoft Visual Studio 2026 ausnutzen, um Administratorrechte zu erlangen, Daten zu manipulieren, vertrauliche Informationen offenzulegen oder die Authentifizierung zu umgehen.

Official advisory ↗
Cyber Security Agency of Singapore · English · CSA-SB-20260610Security Bulletin 10 Jun 2026

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 10 Jun 2026, published on 10 June 2026. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-0796Multiples vulnérabilités dans Tenable Identity Exposure

d?id=CVE-2026-42771 Référence CVE CVE-2026-42789 https://www.cve.org/CVERecord?id=CVE-2026-42789 Référence CVE CVE-2026-42790 https://www.cve.org/CVERecord?id=CVE-2026-42790 Référence CVE CVE-2026-42899 https://www.cve.org/CVERecord?id=CVE-2026-42899 Référence CVE CVE-2026-45445 https://www.cve.org/CVERecord?id=CVE-2026-45445 Référence CVE CVE-2026-45446 https://www.cve.org/CVERecord?id=CVE-2026-45446 Référence CVE CVE-2026-45447 https://www.cve.org/CVERecord?id=CVE-2026-45447 Référence CVE CVE-2026-45490 https://www.cve.org/CVERecord?id=CVE-2026-45490 Référence CVE CVE-2026-45491 https://www.cve.org/CVERecord?id=CVE-2026-45491 Référence CVE CVE-2026-45591 https://www.cve.org/CVERecord?id=CVE-2026-45591 Référence CVE CVE-2026-4873 https://www.cve.org/CVERecord?id=CVE-2026-4873 Référence CVE CVE-2026-5545 https://www.cve.org/CVERecord?id=CVE-2026-5545 Référence CVE CVE-2026-5773 https://www.cve.org/CVERecord?id=CVE-2026-5773 Référence CVE CVE-2026-6253 https://www.cve.org/CVERecord?id=CVE-2026-6253 Référence CVE CVE-2026-6276 https://www.cve.org/CVERecord?id=CVE-2026-6276 Référence CVE CVE-2026-6429 https://www.cve.org/CVERecord?id=CVE-2026-6429 Référence CVE CVE-2026-7009 https://www.cve.org/CVERecord?id=CVE-2026-7009 Référence CVE CVE-2026-7168 https://www.cve.org/CVERecord?id=CVE-2026-7168 R

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-0731Multiples vulnérabilités dans les produits Microsoft

ulletin de sécurité Microsoft CVE-2026-45482 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-45483 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-45484 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-45485 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-45500 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-45501 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-45502 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-45503 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-45504 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-45583 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-45591 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-45644 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-45647 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-45650 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-47281 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-47284 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-47287 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-47292 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-47298 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-47631 du 09 juin 2026 Bulletin de sécurité Microsoft CVE-2026-47634 du 09 juin 2026 Bulletin de s

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-0729Multiples vulnérabilités dans Microsoft .Net

De multiples vulnérabilités ont été découvertes dans Microsoft .Net. Elles permettent à un attaquant de provoquer un déni de service à distance et une atteinte à l'intégrité des données.

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-0728Multiples vulnérabilités dans Microsoft Windows

é Microsoft Windows CVE-2026-44812 du 09 juin 2026 Bulletin de sécurité Microsoft Windows CVE-2026-44813 du 09 juin 2026 Bulletin de sécurité Microsoft Windows CVE-2026-44814 du 09 juin 2026 Bulletin de sécurité Microsoft Windows CVE-2026-44815 du 09 juin 2026 Bulletin de sécurité Microsoft Windows CVE-2026-45487 du 09 juin 2026 Bulletin de sécurité Microsoft Windows CVE-2026-45490 du 09 juin 2026 Bulletin de sécurité Microsoft Windows CVE-2026-45491 du 09 juin 2026 Bulletin de sécurité Microsoft Windows CVE-2026-45586 du 09 juin 2026 Bulletin de sécurité Microsoft Windows CVE-2026-45588 du 09 juin 2026 Bulletin de sécurité Microsoft Windows CVE-2026-45591 du 09 juin 2026 Bulletin de sécurité Microsoft Windows CVE-2026-45592 du 09 juin 2026 Bulletin de sécurité Microsoft Windows CVE-2026-45593 du 09 juin 2026 Bulletin de sécurité Microsoft Windows CVE-2026-45594 du 09 juin 2026 Bulletin de sécurité Microsoft Windows CVE-2026-45595 du 09 juin 2026 Bulletin de sécurité Microsoft Windows CVE-2026-45596 du 09 juin 2026 Bulletin de sécurité Microsoft Windows CVE-2026-45597 du 09 juin 2026 Bulletin de sécurité Microsoft Windows CVE-2026-45598 du 09 juin 2026 Bulletin de sécurité Microsoft Windows CVE-2026-45599 du 09 juin 2026 Bulletin de sécurité Microsoft Windows CVE-2026-45600 du 09 juin 2026 Bul

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2026-020668マイクロソフトの.NET等の複数製品におけるリソースの枯渇に関する脆弱性

ASP.NET Coreにおいて制御されていないリソース消費が発生し、不正な攻撃者がネットワーク経由でサービス拒否攻撃を行う可能性があります。

Official advisory ↗
KISA KrCERT/CC · Korean · KNVD-6837MS 6월 보안 위협에 따른 정기 보안 업데이트 권고

xchange Server Information Disclosure Vulnerability | | Microsoft Exchange Server | CVE-2026-45503 | Microsoft Exchange Server Information Disclosure Vulnerability | | Microsoft Exchange Server | CVE-2026-45504 | Microsoft Exchange Server Elevation of Privilege Vulnerability | | Microsoft Exchange Server | CVE-2026-45583 | Microsoft Exchange Server Remote Code Execution Vulnerability | | Windows Collaborative Translation Framework | CVE-2026-45586 | Windows Collaborative Translation Framework (CTFMON) Elevation of Privilege Vulnerability | | Windows 보안 부팅 | CVE-2026-45588 | Secure Boot Security Feature Bypass Vulnerability | | ASP.NET Core | CVE-2026-45591 | ASP.NET Core Denial of Service Vulnerability | | Windows 인터넷(wininet.dll) | CVE-2026-45592 | Windows Internet (wininet.dll) Elevation of Privilege Vulnerability | | Windows SDK | CVE-2026-45593 | Windows SDK Elevation of Privilege Vulnerability | | Windows 애플리케이션 ID(AppID) 하위 시스템 | CVE-2026-45594 | Windows Application Identity (AppID) Information Disclosure Vulnerability | | Windows MOTW(Mark of the Web) | CVE-2026-45595 | Windows Mark of the Web Security Feature Bypass Vulnerability | | WinSock용 Windows 보조 기능 드라이버 | CVE-2026-45596 | Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability | | UI 자동화 관리자(uiamanage

Official advisory ↗
NCSC-NL · Dutch · NCSC-2026-0184Kwetsbaarheden verholpen in Microsoft Developer Tools

Een kwaadwillende kan de kwetsbaarheden misbruiken om aanvallen uit te voeren die kunnen leiden tot de categorieën schade, zoals beschreven in de onderstaande tabellen. Met uitzondering van de kwetsbaarheid in .NET core, waarvoor geen voorafgaande authenticatie of gebruikersinteractie nodig is om een Denial-of-Service te veroorzaken, moet voor succesvol misbruik de kwaadwillende lokaal toegang hebben tot het kwetsbare systeem, of het slachtoffer misleiden een malafide broncodebestand te openen en uitvoeren. ``` Visual Studio Code: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-47287 | 6.50 | Manipulatie van gegevens | | CVE-2026-47292 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2026-40376 | 7.50 | Verkrijgen van verhoogde rechten | | CVE-2026-47281 | 9.60 | Verkrijgen van verhoogde rechten | | CVE-2026-47284 | 6.50 | Toegang tot gevoelige gegevens | | CVE-2026-48569 | 7.10 | Omzeilen van beveiligingsmaatregel | |----------------|------|-------------------------------------| GitHub Copilot and Visual Studio Code: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-45482 | 8.40 | Omzeilen van beveiligingsmaatregel | |----------------|------|-------------------------------------| Microsoft Live Share Canvas SDK: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-45644 | 8.00 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| ASP.NET Core: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-45591 | 7.50 | Denial-of-Service | |----------------|------|-------------------------------------| .NET: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-45490 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2026-45491 | 6.20 | Manipulatie van gegevens | |----------------|------|-------------------------------------| ```

Official advisory ↗
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Patch available
Affected
Fixed
RHSA-2026:28007: Red Hat Enterprise Linux AppStream EUS (v. 10.0), Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)
Action
Review the linked authoritative reference and apply the recorded fixed release appropriate to the affected product branch.
Workaround
No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04

Evidence and provenance

Published 9 Jun 2026 · Last source change 24 Sept 2026, 13:44 UTC · CWE-770 · Allocation of Resources Without Limits or Throttling

CVE recordCVE.org · 5.2
CVSS sourceCNA
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2026-35549
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceOther authority
NVD statusNVD modified after enrichment

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates ↗
  1. Vendor guidanceAuthoritative vendor guidance changed: added remediation: msrc.microsoft.com/CVE-2026-45591.
    Before
    vendor advisory: msrc.microsoft.com/CVE-2026-45591
    After
    remediation: msrc.microsoft.com/CVE-2026-45591 · vendor advisory: msrc.microsoft.com/CVE-2026-45591
    secure@microsoft.com ↗
  2. Affected versionsThe structured affected or fixed version information changed.
    Before
    10.0.0 < 10.0.9; 8.0.0 < 8.0.28; 9.0.0 < 9.0.17; 10.0 < 10.0.9; 8.0 < 8.0.28; 9.0 < 9.0.17; 18.6.0 < 18.6.3 · Fixed: No fixed version is explicitly recorded in the structured CVE data.
    After
    .NET 10.0: 10.0.0 < 10.0.9; .NET 8.0: 8.0.0 < 8.0.28; .NET 9.0: 9.0.0 < 9.0.17; ASP.NET Core 10.0: 10.0 < 10.0.9; ASP.NET Core 8.0: 8.0 < 8.0.28; ASP.NET Core 9.0: 9.0 < 9.0.17; Microsoft Visual Studio 2026 version 18.6: 18.6.0 < 18.6.3 · Fixed: RHSA-2026:28007: Red Hat Enterprise Linux AppStream EUS (v. 10.0), Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)
    CNA ↗
  3. Remediation statusRemediation status changed from Awaiting fix to Patch available.
    Before
    Awaiting fix
    After
    Patch available
    secure@microsoft.com ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Fixed release or patch reference recorded
ENISA EUVD · EUVD-2026-35549↗CVE authority or vendor reference↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2026-45591 · cve.blacktree.nl