Google Chrome Performance input validation flaw enables sandbox code execution
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA.
Summary
Improper input validation (CWE-20) in the Performance component of Google Chrome before 157.0.8103.38 lets a local attacker run arbitrary code inside the sandbox through a local program. The CVSS 3.1 base score is 7.8 (HIGH), and Chromium rates the issue Low severity. CISA has not added it to KEV, and the references contain no exploit link.
Written with Claude Haiku 5.5 from the sources below · 2026-11-04
Description from the CNA
Improper input validation in Performance in Google Chrome prior to 157.0.8103.38 allowed a local attacker to potentially execute arbitrary code inside the sandbox via a local program. (Chromium security severity: Low)
Why it matters now
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
Remediation
Update Google Chrome to version 157.0.8103.38 or later. Red Hat lists one product as not affected.
Written with Claude Haiku 5.5 from the sources below · 2026-11-04
- Fix · CNA Chrome (Google) Fixed in 157.0.8103.38
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
Google Chrome 157.0.8103.38
213 records Highest priority Priority MEDIUM 96 MEDIUM, 117 LOW
Other records, highest priority first
- TI-2026-84793 Use after free in Chrome TabStrip lets remote attackers run codePriority MEDIUM 43
- TI-2026-84786 Use after free in Google Chrome Extensions allows code executionPriority MEDIUM 43
- TI-2026-84785 Buffer overflow in ANGLE in Google Chrome allows code executionPriority MEDIUM 43
Vendor assessments
Timeline
- 2026-11-03 Threatist record created from CVE-2026-121064
- 2026-11-03 Alias added: GHSA-wjpp-3j4v-qch3
- 2026-11-04 Affected versions changed · Red Hat
- 2026-11-04 CVSS score added · Red Hat
- 2026-11-04 CVSS score added · CISA ADP
- 2026-11-04 CISA SSVC decision points changed
- 2026-11-05 CISA SSVC decision points changed
References
More Google Chrome vulnerabilities
- 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
Sources
- CVE-2026-121064 · CVE Program
- CVE-2026-121064 · NVD
- FIRST EPSS
- GHSA-wjpp-3j4v-qch3 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-121064 · Red Hat security data · CC BY 4.0
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