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CVE-2026-11129: Chromium: CVE-2026-11129 Inappropriate implementation in Extensions

unknownCVE-2026-11129
This CVE was assigned by Chrome. Microsoft Edge (Chromium-based) ingests Chromium, which addresses this vulnerability. Please see Google Chrome Releases for more information.

CSIRTS triage

vendor: Googleproduct: ChromiumOther
What
This vulnerability involves an inappropriate implementation in Extensions.
Who is affected
Users of Microsoft Edge (Chromium-based) that ingest Chromium are affected.
Urgency
Remediation is necessary as it may lead to potential exploitation, though the severity is currently unknown.
Action
Update to the latest version of Chromium as per Google Chrome Releases.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity
unknown
Published
2026-06-09
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-11129

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-11129coverage & exploitation statusNVD · CVE.org

Recent advisories for Chromium

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

More from Microsoft Security Response Center