Vulnerability · Published Oct 27, 2026 · Assigned by VulnCheck

CVE-2026-117560ATXP Gemini CLI Extension through 1.0.0 OS Command Injection via MCP Tools

High 7.8

In plain English

A high-severity OS command injection in gemini-cli-extension from atxp. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 51% of all known vulnerabilities).

Severity (CVSS 3.1)7.8High

Exploit odds (30 days)0.7%top 48.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
atxp	gemini-cli-extension	0 – through 1.0.0

Weakness: CWE-78 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

GitHub Issue #15 issue-tracking
https://github.com/atxp-dev/atxp product
https://github.com/atxp-dev/atxp/blob/4e88b0282b51ae7c22ea1b6ca4476a39298299ff/src/server.ts#L28-L40 technical-description
VulnCheck Advisory: ATXP Gemini CLI Extension through 1.0.0 OS Command Injection via MCP Tools third-party-advisory