harden: using variable interpolation `${{ in action.yml... - #94
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renezander030 merged 1 commit intoAug 23, 2026
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…tion security vulnerability Automated security fix generated by OrbisAI Security
renezander030
enabled auto-merge (squash)
August 23, 2026 05:06
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Summary
Harden input handling in
action.yml(flagged by semgrep).Vulnerability
yaml.github-actions.security.run-shell-injection.run-shell-injectionaction.yml:26Description: Using variable interpolation
${{...}}withgithubcontext data in arun:step could allow an attacker to inject their own code into the runner. This would allow them to steal secrets and code.githubcontext data can have arbitrary user input and should be treated as untrusted. Instead, use an intermediate environment variable withenv:to store the data and use the environment variable in therun:script. Be sure to use double-quotes the environment variable, like this: "$ENVVAR".Threat Model Context
This is a Node.js library - vulnerabilities affect downstream consumers who use this package.
Changes
action.ymlBehavior Preservation
The change is scoped to 1 file on the vulnerable path; it only tightens handling of untrusted input and leaves valid inputs unaffected.
This patch removes an exploit primitive — a code pattern that, while not independently exploitable today, could be chained with other weaknesses by automated exploit-development tooling. Proactive removal of such primitives raises the bar against increasingly capable automated attack tools.
Automated security fix by OrbisAI Security