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TI-2021-04230 Aliases CVE-2021-21126GHSA-vw8h-gwv6-w94m

Improper input validation in Google Chrome

Priority MEDIUM 41CWE-20Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

Insufficient policy enforcement in extensions in Google Chrome prior to 88.0.4324.96 allowed a remote attacker to bypass site isolation via a crafted Chrome Extension.

Why it matters now

EPSS 0.09409 95th percentileScored 2026-11-07
Fix Fixed Chrome (Google): 88.0.4324.96

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
GoogleChromebefore 88.0.4324.9688.0.4324.96Patch availableCNA
  • Chrome VendorGoogle Affected before 88.0.4324.96 Fixed in 88.0.4324.96 Patch available CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*before 88.0.4324.96VulnerableGoogle
cpe:2.3:a:microsoft:edge_chromium:*:*:*:*:*:*:*:*before 88.0.705.50VulnerableMicrosoft
  • cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:* Versions before 88.0.4324.96 Vulnerable ·Google
  • cpe:2.3:a:microsoft:edge_chromium:*:*:*:*:*:*:*:* Versions before 88.0.705.50 Vulnerable ·Microsoft

Remediation

  • Fix · CNA Chrome (Google) Fixed in 88.0.4324.96

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Google Chrome 88.0.4324.96

    26 records Highest priority Priority MEDIUM 15 MEDIUM, 11 LOW

    Other records, highest priority first

    Show all 26 records →

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-21126
  2. 2026-10-03 Alias added: GHSA-vw8h-gwv6-w94m
  3. 2026-10-04 EPSS moved to the 95th–99th percentile

References

Advisory 3

  • 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 7586 →

Sources

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