{"id":"CVE-2026-59947","aliases":["BIT-composer-2026-59947","GHSA-g6xq-892h-64w3"],"url":"https://o3.security/vulnerability/CVE-2026-59947","summary":"Composer: URL-embedded HTTP-Basic username leaks to verbose logs (GitHub PAT exposure)","details":"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.","published":"2026-07-08T19:33:56.009Z","modified":"2026-08-14T18:51:47.955604162Z","cvss":{"score":4.7,"severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N"},"epss":{"score":0.00144,"percentile":0.03964,"asOf":"2026-09-07"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Packagist","name":"composer/composer","fixedVersion":"2.10.2"},{"ecosystem":"Packagist","name":"composer/composer","fixedVersion":"2.2.29"}],"fix":{"url":"https://github.com/composer/composer/commit/6bd66874ae523ecb69aca5964487a0cdfda03ef8","label":"composer/composer@6bd6687"},"references":[{"type":"WEB","url":"https://github.com/composer/composer/releases/tag/2.10.2"},{"type":"WEB","url":"https://github.com/composer/composer/releases/tag/2.2.29"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/59xxx/CVE-2026-59947.json"},{"type":"ADVISORY","url":"https://github.com/composer/composer/security/advisories/GHSA-g6xq-892h-64w3"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-59947"},{"type":"FIX","url":"https://github.com/composer/composer/commit/6bd66874ae523ecb69aca5964487a0cdfda03ef8"},{"type":"FIX","url":"https://github.com/composer/composer/commit/8887ad76fbd830cb1861a2b1fd8ead78ed1fa1ec"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-14T18:51:47.955604162Z"}}