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Insufficient policy enforcement in chrome-devtools-mcp allows local read/write

Priority LOW 19CWE-284Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-284.

Summary

Insufficient policy enforcement in chrome-devtools-mcp in Google Chrome on Linux from 1.1.0 before 1.5.0 lets a local attacker perform arbitrary read and write operations. The flaw is classified as CWE-284 (improper access control). Exploitation requires a victim to interact with a malicious file, and the attack affects confidentiality and integrity but not availability.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

Insufficient policy enforcement in chrome-devtools-mcp in Google Chrome on Linux prior to 1.5.0 allowed a local attacker to perform arbitrary read/write via a malicious file. (Chromium security severity: Medium)

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00121 1st percentileScored 2026-11-07
Fix Fixed chrome-devtools-mcp (Google): 1.5.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

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

Affected products

VendorProductAffected versionsFixed inStatusSource
Googlechrome-devtools-mcp1.1.0 to before 1.5.01.5.0Patch availableCNA
  • chrome-devtools-mcp VendorGoogle Affected 1.1.0 to before 1.5.0 Fixed in 1.5.0 Patch available CNA

Remediation

Update chrome-devtools-mcp to version 1.5.0 or later, which fixes the flaw.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

  • Fix · CNA chrome-devtools-mcp (Google) Fixed in 1.5.0

Timeline

  1. 2026-10-28 Threatist record created from CVE-2026-106484
  2. 2026-10-28 Alias added: GHSA-2mw5-2f2c-v2g3
  3. 2026-10-29 CVSS score added · CISA ADP
  4. 2026-10-29 CISA SSVC decision points changed
  5. 2026-10-29 Weakness changed · CISA ADP

References

  • 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