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CVE PROGRAM SOURCE RECORD4.7 Medium

CVE-2026-59947

Composer: URL-embedded HTTP-Basic username leaks to verbose logs (GitHub PAT exposure)

Description

Composer is a dependency Manager for the PHP language. Prior to 2.2.29 and 2.10.2, when Composer is run with -vvv debug verbosity, it could print a credential embedded in the username slot of a repository or package URL, such as a GitHub Personal Access Token in https://TOKEN@host/, to debug output because AuthHelper, Url::sanitize, and ProcessExecutor did not sanitize username-only URL credentials. This issue is fixed in versions 2.2.29 and 2.10.2.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

composer composer

  • >= 1.0, < 2.2.29affected
  • >= 2.3.0, < 2.10.2affected

References