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**Name of the Vulnerable Software and Affected Versions** LiuOS versions 0.1.0 and prior **Description** LiuOS is a small Python project that imitates the functions of a regular operating system. The issue allows an attacker to set the `GITHUB ACTIONS` environment variable to anything other than null or true, which enables them to skip authentication checks. A test script is run instead of allowing login when the variable is set to true. **Recommendations** For versions 0.1.0 and prior, a potential workaround is to check for the `GITHUB ACTIONS` environment variable and set it to null to force credential checks. Update to the latest commit (c658b4f3e57258acf5f6207a90c2f2169698ae22) which requires the `GITHUB ACTIONS` variable to be set to true, thus preventing attackers from skipping authentication checks.