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TI-2026-82972 Aliases CVE-2026-85268GHSA-vwmj-j37x-r937

Cross-site scripting in Firebase Auth handler via malicious bundle ID

Priority MEDIUM 40CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
Cross-site scripting
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

Cross-site scripting (CWE-79) in the auth handler of Google Cloud Identity Platform and Firebase Authentication before 2026-08-14 on iOS lets an unauthenticated remote attacker run arbitrary JavaScript through a malicious iOS bundle ID. User interaction is required, and the flaw can affect confidentiality, integrity and availability of the affected system.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00581 47th percentileScored 2026-11-07
Fix Fixed Identity Platform and Firebase Authentication (Google Cloud): 2026-08-14

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
GoogleIdentity Platform and Firebase Authenticationbefore 2026-08-142026-08-14Patch availableCNA
  • Identity Platform and Firebase Authentication VendorGoogle Affected before 2026-08-14 Fixed in 2026-08-14 Patch available CNA

Remediation

Google Cloud Identity Platform and Firebase Authentication are fixed in 2026-08-14. The sources list no fixed version for Identity Platform and Firebase Authentication on other platforms.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

  • Fix · CNA Identity Platform and Firebase Authentication (Google Cloud) Fixed in 2026-08-14

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-30 Threatist record created from CVE-2026-85268
  2. 2026-10-30 Alias added: GHSA-vwmj-j37x-r937
  3. 2026-10-30 CISA SSVC decision points changed
  4. 2026-10-30 Priority changed: MEDIUM → LOW
  5. 2026-11-01 Priority changed: LOW → MEDIUM
  6. 2026-11-06 Affected versions changed · Red Hat
  7. 2026-11-06 CVSS score added · Red Hat

References

Other 1

  • TI-2025-09686 Type confusion in Google Chrome KEVCVSS 3.1CRITICAL 9.8
  • TI-2024-07390 Type confusion in Google Chrome KEVCVSS 3.1CRITICAL 9.6
  • TI-2024-04898 Type confusion in Google Chrome KEVCVSS 3.1CRITICAL 9.6
  • TI-2024-04600 Type confusion in Google Chrome KEVCVSS 3.1CRITICAL 9.6
  • TI-2024-04346 Use after free in Google Chrome KEVCVSS 3.1CRITICAL 9.6
  • TI-2023-05824 Integer overflow in Google Chrome KEVCVSS 3.1CRITICAL 9.6
See all 17247 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences