CVE-2026-12017

unknowncovered by 1 sourcefirst seen 2026-06-09

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: This vulnerability involves insufficient validation of untrusted input in extensions.
Who is affected: Microsoft Edge (Chromium-based) users that ingest Chromium.
Urgency: Remediation is necessary as it could lead to potential exploitation, although the severity is currently unknown.
Action: Refer to Google Chrome Releases for updates and patches.

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

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Exploitation outlook

Low exploitation risk0.21% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 11% of all EPSS-scored CVEs.

Advisory coverage (1)

unknownCVE-2026-12017: Chromium: CVE-2026-12017 Insufficient validation of untrusted input Extensionsmsrc · 2026-06-09

External references

NVD record for CVE-2026-12017

CVE.org record

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