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CVE-2026-12537

Unauthenticated Remote Code Execution in Gemini CLI CI/CD Workflows

CVSS 4.0 10.0 CRITICALCheck source for fixed versionsKEV status unknown

Original advisory

Historical advisory recorded 23 Oct 2026 15:48:27 UTC. Read the latest advisory.

cve-program · CVE-2026-12537

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-12537

Published

Gemini CLI

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Google Cloud",
                    "product": "Gemini CLI",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "0",
                            "lessThan": "0.39.1",
                            "versionType": "custom"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }

run-gemini-cli GitHub Action

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Google Cloud",
                    "product": "run-gemini-cli GitHub Action",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "0",
                            "lessThan": "0.1.22",
                            "versionType": "custom"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }

Original source record · Cite this exact observation · Complete original publisher JSON