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TI-2026-81164 Aliases CVE-2026-117560GHSA-w542-83fj-2ghf

OS command injection in ATXP Gemini CLI extension via MCP tools

Priority MEDIUM 40CWE-78Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-78.

Summary

The ATXP Gemini CLI extension through 1.0.0 contains an OS command injection flaw (CWE-78) in runAtxp(). Unsanitized MCP tool parameters reach the shell, so command substitutions in values such as message_id, subject or query run as the user. A local attacker with low privileges can plant such instructions in email or SMS content to run commands.

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

Description from the CNA

ATXP Gemini CLI extension through 1.0.0 contains an OS command injection vulnerability in runAtxp() that allows attackers to execute shell commands through unsanitized MCP tool parameters. Attackers can plant instructions in email or SMS content to inject $() or backtick substitutions into parameters like message_id, subject, or query, running commands as the user.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00652 51st percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

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
atxpgemini-cli-extensionup to 1.0.0—No fix listedCNA
  • gemini-cli-extension Vendoratxp Affected up to 1.0.0 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for gemini-cli-extension.

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

Timeline

  1. 2026-10-27 Threatist record created from CVE-2026-117560
  2. 2026-10-27 Alias added: GHSA-w542-83fj-2ghf
  3. 2026-10-28 CISA SSVC decision points changed
  4. 2026-10-28 Priority changed: MEDIUM → LOW
  5. 2026-10-28 Priority changed: LOW → MEDIUM

References

Other 3

Sources

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