CVE-2026-85268

HighCVSS 8.7

Published: 30/10/2026(UTC)Updated: 30/10/2026(UTC)Translated: 30/10/2026(UTC)NVD NIST

Exploitation Probability (EPSS)

Low risk

0.58%

48th percentile - higher than 48% of all known CVEs

Summary

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.

Risk Assessment

An attacker could execute malicious script in the context of the application or user, potentially leading to session data theft or actions on behalf of the victim.

Recommendation

Update Google Cloud Identity Platform and Firebase Authentication to version 2026-08-14 or later and verify bundle ID configuration.

Other vulnerabilities in Firebase Authentication

CVE-2026-76793High
The Firebase Authentication WordPress plugin before 1.7.1 does not require the email address in an authentication token to be verified before matching it to a WordPress account and issuing a session, allowing unauthenticated attackers to log in as any user, including administrators.

Original NVD description (English source)

Vulnerability data from NVD (NIST) · CISA KEV · EPSS