HIGH 7.4 Microsoft

CVE-2026-91734

Chromium CVE-2026-91734: Incorrect authorization

Microsoft Security Update 2026-Sep: Chromium CVE-2026-91734: Incorrect authorization

Affected Products

Microsoft Edge (Chromium-based)

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-91734
https://nvd.nist.gov/vuln/detail/CVE-2026-91734

Published: 2026-09-08 · Source: Microsoft · Feed updated: 2026-10-31

This high severity vulnerability with a CVSS score of 7.4 was published on 2026-09-08 via Microsoft. Affected: Microsoft Edge (Chromium-based).

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