CVE-2026-85268

8.7 high

A Cross-Site Scripting (XSS) (CWE-79) vulnerability in the auth/handler in Google Cloud Identity Platform and Firebase Authentication versions prior to 2026-08-14 on iOS allows an unauthenticated remote attacker to execute arbitrary JavaScript using a malicious iOS bundle ID.

Severity

CVSS 4.0

8.7 high

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L/U:Amber

CWE: CWE-79
Published: 2026-10-30
Modified: 2026-10-30
Record from: the NVD, synced 2026-10-30

References

https://firebase.google.com/support/releases#auth-helper-fix

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