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CVE-2026-12537 is a critical OS command injection vulnerability in the container launcher used by Google Gemini CLI and the run-gemini-cli GitHub Action. It affects Gemini CLI versions prior to 0.39.1, including preview builds noted as prior to 0.40.0-preview.3, and run-gemini-cli versions prior to 0.1.22. In headless CI environments, the vulnerable implementation could load attacker-controlled configuration from a crafted .gemini/.env file and pass insufficiently neutralized input into an operating-system command before sandbox protections were established. The flaw is particularly dangerous in non-interactive CI/CD workflows that process untrusted repository content or pull requests, because exploitation can occur pre-sandbox and at the host level.
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What an attacker gets, and what they’ve been doing with it.
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No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
10 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An OS command injection vulnerability in Gemini CLI's container launcher that can allow an unprivileged attacker to execute code on the host of a headless CI platform before the sandbox starts.
A critical remote code execution vulnerability in Google Gemini CLI and its related GitHub Action caused by improper workspace trust handling in headless CI environments and allowlist bypass behavior in --yolo mode, enabling arbitrary command execution in CI/CD pipelines processing untrusted input.
A critical unauthenticated remote code execution vulnerability in Google Gemini CLI and the run-gemini-cli GitHub Action that allows pre-sandbox host-level code execution on headless CI platforms via a malicious .gemini/.env file.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.