by Kastro
Paper/Archive/CVE-2026-12537

CVE-2026-12537

Google Cloud Gemini CLI — Unauthenticated Remote Code Execution in Gemini CLI CI/CD Workflows

EPSS 0.2%CVSS 10.0
critical.is priorityof 100
32
CVSS 10.0 (CNA)10.0 / 10 × 3030.0Not in CISA KEV+300.0EPSS percentile 11.5.115 × 202.3No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
Gemini CLI< 0.39.10.39.1CNA
run-gemini-cli GitHub Action< 0.1.220.1.22CNA

Scores by source

GoogleCloud (CNA)10.0CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/U:Clear
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

refgithub.com/google-github-actions/run-gemini-cli/security/advisories/GHSA-wpqr-6v78-jr5g