What is CVE-2026-12537?

CVE-2026-12537 is a high-severity vulnerability in Google Gemini-cli, classified under Improper Input Validation. CVSS score: 7.8/10. Published 2026-06-24.

How severe is CVE-2026-12537?

High severity. CVSS v3 base score is 7.8 out of 10.

RCE in Google Gemini-cli

CVE-2026-12537

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…

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

EPSS: 0.002 (5.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Google Gemini-cli — versions 0.40.0
Google Run-gemini-cli
Google Cloud Gemini Cli — versions 0
Google Cloud Run-gemini-cli Github Action — versions 0

Weakness classification (CWE)

References

f45cbf4e-4146-4068-b7e1-655ffc2c548c (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-12537?: CVE-2026-12537 is a high-severity vulnerability in Google Gemini-cli, classified under Improper Input Validation. CVSS score: 7.8/10. Published 2026-06-24.
How severe is CVE-2026-12537?: High severity. CVSS v3 base score is 7.8 out of 10.