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Full vulnerability report · 2026
CVE-2026-11643High confidence

Use after free in Proxy in Google Chrome prior to 149.0.7827.103 allowed a remote attacker to execute arbitrary code via malicious network traffic

Google · Chrome

8.1HighCVSS 3.1
Recommended action
Within 7 days

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

Fix not verified
Optional official sources

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

Select the national-authority views to include. The exact source language is shown on each matched advisory. Your choice is remembered on this device and encoded in the shareable URL.

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-2026-35243

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

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
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionWithin 7 days

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

Fix not verified
01

What, why and how

Use after free in Proxy in Google Chrome prior to 149.0.7827.103 allowed a remote attacker to execute arbitrary code via malicious network traffic. (Chromium security severity: Critical)

What

Use after free in Proxy in Google Chrome prior to 149.0.7827.103 allowed a remote attacker to execute arbitrary code via malicious network traffic. (Chromium security severity: Critical)

Why

The program can continue using memory after it has been released, producing unsafe and attacker-influenceable behaviour.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may execute code or commands in the affected security context.

What

Use after free in Proxy in Google Chrome prior to 149.0.7827.103 allowed a remote attacker to execute arbitrary code via malicious network traffic. (Chromium security severity: Critical)

Why

The program can continue using memory after it has been released, producing unsafe and attacker-influenceable behaviour.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may execute code or commands in the affected security context.

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 → Use After Free → execute code or commands in the affected security context
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
None
Attack complexity
High: exploitation depends on specific conditions
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-416

CWE-416: Use After Free. The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory belongs to the code that operates on the new pointer.

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:H/PR:N/UI:N/S:U/C:H/I:H/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.ACHighAttack complexity: Successful exploitation depends on specific conditions outside the attacker's direct control.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.CHighConfidentiality impact: A successful attack can cause a major loss.IHighIntegrity impact: A successful attack can cause a major loss.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land
After compromise, an attacker may use built-in shells, scripting engines, scheduled tasks and native network utilities for discovery, persistence or movement. This is a plausible LoTL path, not evidence that it has occurred for every attack.
NetworkUnauthenticatedRemote code executionCWE-416
A

Official authority intelligence

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

BSI · German · WID-SEC-W-2026-1819Google Chrome / Microsoft Edge: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in Google Chrome / Microsoft Edge ausnutzen, um beliebigen Programmcode auszuführen, Sicherheitsmaßnahmen zu umgehen, Daten zu manipulieren, vertrauliche Informationen offenzulegen, einen Denial-of-Service-Zustand zu verursachen oder andere, nicht näher spezifizierte Angriffe durchzuführen.

Official advisory
CERT-FR · French · CERTFR-2026-AVI-0853Multiples vulnérabilités dans les produits Palo Alto Networks

d?id=CVE-2026-11634 Référence CVE CVE-2026-11635 https://www.cve.org/CVERecord?id=CVE-2026-11635 Référence CVE CVE-2026-11636 https://www.cve.org/CVERecord?id=CVE-2026-11636 Référence CVE CVE-2026-11637 https://www.cve.org/CVERecord?id=CVE-2026-11637 Référence CVE CVE-2026-11638 https://www.cve.org/CVERecord?id=CVE-2026-11638 Référence CVE CVE-2026-11639 https://www.cve.org/CVERecord?id=CVE-2026-11639 Référence CVE CVE-2026-11640 https://www.cve.org/CVERecord?id=CVE-2026-11640 Référence CVE CVE-2026-11641 https://www.cve.org/CVERecord?id=CVE-2026-11641 Référence CVE CVE-2026-11642 https://www.cve.org/CVERecord?id=CVE-2026-11642 Référence CVE CVE-2026-11643 https://www.cve.org/CVERecord?id=CVE-2026-11643 Référence CVE CVE-2026-11644 https://www.cve.org/CVERecord?id=CVE-2026-11644 Référence CVE CVE-2026-11645 https://www.cve.org/CVERecord?id=CVE-2026-11645 Référence CVE CVE-2026-11646 https://www.cve.org/CVERecord?id=CVE-2026-11646 Référence CVE CVE-2026-11647 https://www.cve.org/CVERecord?id=CVE-2026-11647 Référence CVE CVE-2026-11648 https://www.cve.org/CVERecord?id=CVE-2026-11648 Référence CVE CVE-2026-11649 https://www.cve.org/CVERecord?id=CVE-2026-11649 Référence CVE CVE-2026-11650 https://www.cve.org/CVERecord?id=CVE-2026-11650 Référence CVE CVE-2026-11651 https://www.cve.org/CVERecord?id=

Official advisory
CERT-FR · French · CERTFR-2026-AVI-0757Multiples vulnérabilités dans Microsoft Edge

juin 2026 Bulletin de sécurité Microsoft Edge CVE-2026-11634 du 15 juin 2026 Bulletin de sécurité Microsoft Edge CVE-2026-11635 du 15 juin 2026 Bulletin de sécurité Microsoft Edge CVE-2026-11636 du 15 juin 2026 Bulletin de sécurité Microsoft Edge CVE-2026-11637 du 15 juin 2026 Bulletin de sécurité Microsoft Edge CVE-2026-11638 du 15 juin 2026 Bulletin de sécurité Microsoft Edge CVE-2026-11639 du 15 juin 2026 Bulletin de sécurité Microsoft Edge CVE-2026-11640 du 15 juin 2026 Bulletin de sécurité Microsoft Edge CVE-2026-11641 du 15 juin 2026 Bulletin de sécurité Microsoft Edge CVE-2026-11642 du 15 juin 2026 Bulletin de sécurité Microsoft Edge CVE-2026-11643 du 15 juin 2026 Bulletin de sécurité Microsoft Edge CVE-2026-11644 du 15 juin 2026 Bulletin de sécurité Microsoft Edge CVE-2026-11645 du 15 juin 2026 Bulletin de sécurité Microsoft Edge CVE-2026-11646 du 15 juin 2026 Bulletin de sécurité Microsoft Edge CVE-2026-11648 du 15 juin 2026 Bulletin de sécurité Microsoft Edge CVE-2026-11649 du 15 juin 2026 Bulletin de sécurité Microsoft Edge CVE-2026-11650 du 15 juin 2026 Bulletin de sécurité Microsoft Edge CVE-2026-11651 du 15 juin 2026 Bulletin de sécurité Microsoft Edge CVE-2026-11652 du 15 juin 2026 Bulletin de sécurité Microsoft Edge CVE-2026-11653 du 15 juin 2026 Bulletin de sécurité Microsoft

Official advisory
CERT-FR · French · CERTFR-2026-AVI-0708Multiples vulnérabilités dans Google Chrome

d?id=CVE-2026-11634 Référence CVE CVE-2026-11635 https://www.cve.org/CVERecord?id=CVE-2026-11635 Référence CVE CVE-2026-11636 https://www.cve.org/CVERecord?id=CVE-2026-11636 Référence CVE CVE-2026-11637 https://www.cve.org/CVERecord?id=CVE-2026-11637 Référence CVE CVE-2026-11638 https://www.cve.org/CVERecord?id=CVE-2026-11638 Référence CVE CVE-2026-11639 https://www.cve.org/CVERecord?id=CVE-2026-11639 Référence CVE CVE-2026-11640 https://www.cve.org/CVERecord?id=CVE-2026-11640 Référence CVE CVE-2026-11641 https://www.cve.org/CVERecord?id=CVE-2026-11641 Référence CVE CVE-2026-11642 https://www.cve.org/CVERecord?id=CVE-2026-11642 Référence CVE CVE-2026-11643 https://www.cve.org/CVERecord?id=CVE-2026-11643 Référence CVE CVE-2026-11644 https://www.cve.org/CVERecord?id=CVE-2026-11644 Référence CVE CVE-2026-11645 https://www.cve.org/CVERecord?id=CVE-2026-11645 Référence CVE CVE-2026-11646 https://www.cve.org/CVERecord?id=CVE-2026-11646 Référence CVE CVE-2026-11647 https://www.cve.org/CVERecord?id=CVE-2026-11647 Référence CVE CVE-2026-11648 https://www.cve.org/CVERecord?id=CVE-2026-11648 Référence CVE CVE-2026-11649 https://www.cve.org/CVERecord?id=CVE-2026-11649 Référence CVE CVE-2026-11650 https://www.cve.org/CVERecord?id=CVE-2026-11650 Référence CVE CVE-2026-11651 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.
Fix not verified
Affected
149.0.7827.103 < 149.0.7827.103
Fixed
No fixed version is explicitly recorded in the structured CVE data.
Action
No verified patch reference is present in the current structured sources. Check the vendor advisory before making a change.
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 8 Jun 2026 · Last source change 9 Jun 2026, 03:55 UTC · CWE-416 · Use After Free

CVE recordCVE.org · 5.2
CVSS sourceCISA ADP
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-2026-35243
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceCNA
NVD statusNVD enriched

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

Material change intelligence

What changed after publication

View recent updates →

No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.

Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
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-2026-11643 · cve.blacktree.nl