CVE-2026-59947 — Composer: URL-embedded HTTP-Basic username leaks to verbose logs (GitHub PAT exposure)
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 us…
Published: 2026-07-08 · CVSS: 4.7 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7