CVE-2026-45793

Composer is a dependency Manager for the PHP language. Prior to 1.10.28, 2.2.28, and 2.9.8, Composer\IO\BaseIO::loadConfiguration validates GitHub OAuth tokens with the regex ^.A-Za-z0-9+$ and interpolates rejected tokens into an UnexpectedValueException; GitHub Actions GITHUBTOKEN values using t...

GHSA-F9F8-RM49-7JV2 Github Actions issued GITHUB_TOKEN disclosure in GitHub Actions logs

Summary Composer leaks the full contents of tokens configured as GitHub OAuth tokens if they do not match Composer's expected format for such tokens to stderr. GitHub has introduced a new format for GitHub Actions GITHUBTOKEN values. These tokens are validated in the same way by Composer on GitHu...

Generation of Error Message Containing Sensitive Information

Overview composer/composer is a Dependency Manager for PHP. Composer helps you declare, manage and install dependencies of PHP projects. It ensures you have the right stack everywhere. Affected versions of this package are vulnerable to Generation of Error Message Containing Sensitive Information...