CVE-2026-13999

mediumCVSS 4.3covered 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: Inappropriate implementation in Extensions could lead to security issues.
Who is affected: Users of Chromium and Microsoft Edge (Chromium-based) that utilize extensions.
Urgency: Urgency is unknown as the severity is not specified and exploitation is not confirmed.
Action: Monitor for updates from Google Chrome Releases.

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

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Exploitation outlook

Low exploitation risk0.18% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 7% of all EPSS-scored CVEs.

Advisory coverage (2)

unknownCVE-2026-13999: Chromium: CVE-2026-13999 Inappropriate implementation in Extensionsmsrc · 2026-07-02
mediumCVE-2026-13999: 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-2026-13999

CVE.org record

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