CVE-2026-59947
MEDIUMComposer: URL-embedded HTTP-Basic username leaks to verbose logs (GitHub PAT exposure)
Title source: cnaDescription
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.
References (5)
Core 5
Core References
X_Refsource_Confirm x_refsource_confirm
https://github.com/composer/composer/security/advisories/GHSA-g6xq-892h-64w3
X_Refsource_Misc x_refsource_misc
https://github.com/composer/composer/commit/6bd66874ae523ecb69aca5964487a0cdfda03ef8
X_Refsource_Misc x_refsource_misc
https://github.com/composer/composer/commit/8887ad76fbd830cb1861a2b1fd8ead78ed1fa1ec
X_Refsource_Misc x_refsource_misc
https://github.com/composer/composer/releases/tag/2.10.2
X_Refsource_Misc x_refsource_misc
https://github.com/composer/composer/releases/tag/2.2.29
Scores
CVSS v3
4.7
EPSS
0.0012
EPSS Percentile
2.2%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-532
Status
published
Products (4)
composer/composer
1.0.0 - 2.2.29Packagist
composer/composer
2.3.0 - 2.10.2Packagist
composer/composer
>= 1.0, < 2.2.29
composer/composer
>= 2.3.0, < 2.10.2
Published
Jul 08, 2026
Tracked Since
Jul 09, 2026