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CVE-2026-55158 is a command injection vulnerability in conflibot that can be triggered through crafted pull request branch names when the action is used in GitHub Actions workflows under the pull_request_target event. Affected versions construct git-related shell commands using attacker-controlled branch name data, allowing untrusted input to reach shell execution. In vulnerable deployments, a malicious pull request can cause arbitrary commands to run on the GitHub Actions runner. The issue is addressed in fixed releases by replacing shell-based command execution with safer argument-array invocation mechanisms and by referencing pull requests through refs/pull/<number>/head rather than attacker-controlled branch names.
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No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
1 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.
No news coverage yet. Advisories and community discussion only.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
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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.