CVE-2026-85268EUVD-2026-113761GHSA-VWMJ-J37X-R937
Cross-Site Scripting (XSS) in Firebase Auth Handler via Malicious Bundle ID
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 2026-08-14
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
CISA's decision points: whether it is exploited, whether attacks can be automated, and how much control an attacker gets. Assessed (SSVC 2.0.3).What do these mean? →
- Exploitation: none
- Automatable: no
- Technical impact: total
Summary
Google Cloud Identity Platform and Firebase Authentication on iOS are affected by this flaw in their auth handler. An unauthenticated remote attacker could exploit it using a crafted iOS bundle ID to run arbitrary JavaScript, potentially compromising users' sessions or data.
Summarized by anthropic/claude-haiku-5.5. Verify details against the original sources.
Read the original description
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.
Timeline
- CVE published
- First seen by cve.now
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: total
- Record last updated
Affected versions
- Google Cloud Identity Platform and Firebase Authentication
fixed in 2026-08-14