CVE-2026-13891

highCVSS 7.5covered by 2 sourcesfirst seen 2026-06-30

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

What: There is insufficient validation of untrusted input in Extensions.
Who is affected: Users of Microsoft Edge (Chromium-based) that ingest Chromium.
Urgency: Remediation is necessary as vulnerabilities in Chromium can affect multiple browsers, including Edge.
Action: Update to the latest version of Chromium or Microsoft Edge.

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

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Exploitation outlook

Low exploitation risk0.30% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 22% of all EPSS-scored CVEs.

Advisory coverage (2)

unknownCVE-2026-13891: Chromium: CVE-2026-13891 Insufficient validation of untrusted input in Extensionsmsrc · 2026-07-02
highCVE-2026-13891: Insufficient validation of untrusted input in Extensions in Google Chrome prior to 150.0.7871.…nvd · 2026-06-30

External references

NVD record for CVE-2026-13891

CVE.org record

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