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cve recordhigh

CVE-2026-12537

google · gemini-cli

Published
CVSS7.8
Severityhigh
WeaknessCWE-20
ExploitedNot in CISA KEV

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Description

Improper Neutralization used in an OS Command in the container launcher in Google Gemini CLI (versions prior to 0.39.1) and run-gemini-cli GitHub Action (versions prior to 0.1.22) on headless CI platforms allows an unprivileged attacker to achieve pre-sandbox host-level code execution a maliciously crafted .gemini/.env file.

References

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Our coverage of CVE-2026-12537

CVE-2026-12537critical

Claude Code and Gemini CLI Flaws Let a GitHub Issue Reach CI Workflow Secrets

Researchers discovered vulnerabilities in Anthropic's Claude Code and Google's Gemini CLI that allowed unprivileged attackers to execute code on CI runners. The flaws, which have been patched and assigned CVEs, involved issues with command validation and container launching. A separate finding related to OpenAI's Codex also allowed for the hijacking of agent runs, though OpenAI considers its sandbox to have behaved as documented.