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Full vulnerability report · 2026
CVE-2026-93441High confidence

IBM QRadar SIEM HTTP Receiver protocol is vulnerable to a denial of service

IBM · QRadar Security Information and Event Management

8.6HighCVSS 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 0.33% 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 IBM QRadar Security Information and Event Management 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.

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-2026-106860

No EUVD known-exploited evidence

IBM QRadar SIEM could allow a remote attacker to cause a denial of service due to uncontrolled resource consumption.

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
8.6 · 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

IBM QRadar SIEM could allow a remote attacker to cause a denial of service due to uncontrolled resource consumption.

What

IBM QRadar SIEM could allow a remote attacker to cause a denial of service due to uncontrolled resource consumption.

Why

The product does not properly control the allocation and maintenance of a limited resource.

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

IBM QRadar SIEM could allow a remote attacker to cause a denial of service due to uncontrolled resource consumption.

Why

The product does not properly control the allocation and maintenance of a limited resource.

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 → Uncontrolled Resource Consumption → 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
Changed: exploitation can affect a different security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-400 ↗

CWE-400: Uncontrolled Resource Consumption. The product does not properly control the allocation and maintenance of a limited resource.

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:C/C:N/I:N/A:H

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.SChangedScope: The attack can affect a component governed by a different security 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-400
A

Official authority intelligence

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

ENISA EUVD · EUVD-2026-106860Official EUVD mapping

IBM QRadar SIEM could allow a remote attacker to cause a denial of service due to uncontrolled resource consumption.

Official EUVD record ↗
BSI · German · WID-SEC-2026-3901IBM QRadar SIEM: Schwachstelle ermöglicht Denial of Service

Ein entfernter, anonymer Angreifer kann eine Schwachstelle in IBM QRadar SIEM ausnutzen, um einen Denial of Service Angriff durchzuführen.

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-1336Avis du CERT-FR

d?id=CVE-2026-89044 Référence CVE CVE-2026-89045 https://www.cve.org/CVERecord?id=CVE-2026-89045 Référence CVE CVE-2026-89046 https://www.cve.org/CVERecord?id=CVE-2026-89046 Référence CVE CVE-2026-89407 https://www.cve.org/CVERecord?id=CVE-2026-89407 Référence CVE CVE-2026-89425 https://www.cve.org/CVERecord?id=CVE-2026-89425 Référence CVE CVE-2026-90560 https://www.cve.org/CVERecord?id=CVE-2026-90560 Référence CVE CVE-2026-90852 https://www.cve.org/CVERecord?id=CVE-2026-90852 Référence CVE CVE-2026-91776 https://www.cve.org/CVERecord?id=CVE-2026-91776 Référence CVE CVE-2026-91777 https://www.cve.org/CVERecord?id=CVE-2026-91777 Référence CVE CVE-2026-93441 https://www.cve.org/CVERecord?id=CVE-2026-93441 Référence CVE CVE-2026-93442 https://www.cve.org/CVERecord?id=CVE-2026-93442 Référence CVE CVE-2026-93488 https://www.cve.org/CVERecord?id=CVE-2026-93488 Référence CVE CVE-2026-93558 https://www.cve.org/CVERecord?id=CVE-2026-93558 Référence CVE CVE-2026-93565 https://www.cve.org/CVERecord?id=CVE-2026-93565 Référence CVE CVE-2026-93566 https://www.cve.org/CVERecord?id=CVE-2026-93566 Référence CVE CVE-2026-93573 https://www.cve.org/CVERecord?id=CVE-2026-93573 Référence CVE CVE-2026-93888 https://www.cve.org/CVERecord?id=CVE-2026-93888 Référence CVE CVE-2026-93895 https://www.cve.org/CVERecord?id=

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
QRadar Security Information and Event Management: 7.4-20210823144546 ≤ 7.5-20260930064858, 7.6-20260330053257 ≤ 7.6-20260930064910
Fixed
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 20 Oct 2026 · Last source change 20 Oct 2026, 21:51 UTC · CWE-400 · Uncontrolled Resource Consumption

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 2026-10-21
European sourceENISA EUVD · EUVD-2026-106860
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceCNA
NVD statusNVD awaiting enrichment

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

Material change intelligence

What changed after publication

View recent updates ↗
  1. ENISA EUVD mappingEUVD-2026-106860 was added to the official ENISA EUVD mapping for this CVE.
    Before
    not recorded
    After
    {"euvdId":"EUVD-2026-106860"}
    ENISA EUVD ↗
  2. Vendor guidanceAuthoritative vendor guidance changed: removed patch: ibm.com/7292244.
    Before
    patch: ibm.com/7292244 · remediation: ibm.com/7292244
    After
    remediation: ibm.com/7292244
    CNA ↗
  3. Vendor guidanceAuthoritative vendor guidance changed: added patch: ibm.com/7292244; added remediation: ibm.com/7292244; removed remediation: wid.cert-bund.de/securityadvisory?name=WID-SEC-2026-3901.
    Before
    remediation: wid.cert-bund.de/securityadvisory?name=WID-SEC-2026-3901
    After
    patch: ibm.com/7292244 · remediation: ibm.com/7292244
    ibm.com ↗
  4. Affected versionsThe structured affected or fixed version information changed.
    Before
    IBM QRadar SIEM HTTP Receiver <7.6-20260930064911; IBM QRadar SIEM HTTP Receiver <7.5-20260930064859 · Fixed: No fixed version is explicitly recorded in this authority advisory.
    After
    QRadar Security Information and Event Management: 7.4-20210823144546 ≤ 7.5-20260930064858, 7.6-20260330053257 ≤ 7.6-20260930064910 · Fixed: IBM strongly encourages customers to update their systems promptly.; ProductProtocolVersionFixIBM QRadar SIEMHTTP Receiver 7.5 PROTOCOL-HTTPReceiver-7.5-20260930064859.noarch.rpm https://www.ibm.com/support/fixcentral/swg/selectFixes IBM QRadar SIEMHTTP Receiver 7.6 PROTOCOL-HTTPReceiver-7.6-20260930064911.noarch.rpm https://www.ibm.com/support/fixcentral/swg/selectFixes; These RPMs will be updated as part of QRadar Auto Update https://www.ibm.com/docs/en/qsip/7.6.0 where enabled.
    CNA ↗
  5. Remediation statusRemediation status changed from Awaiting fix to Patch available.
    Before
    Awaiting fix
    After
    Patch available
    ibm.com ↗
  6. SeveritySeverity changed from Unknown to High.
    Before
    Unknown
    After
    High
    CNA ↗
  7. CVSS scoreCVSS score changed from not recorded to 8.6 (CVSS 3.1 · CNA · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H).
    Before
    not recorded
    After
    8.6 (CVSS 3.1 · CNA · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H)
    CNA ↗
  8. Catalogue recordCVE added to the BlackTree catalogue.
    Official national cybersecurity authority ↗
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-2026-106860↗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-2026-93441 · cve.blacktree.nl