CVE-2026-59947
Medium
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.
SeverityMedium
CVSS4.7
Exploit probability—
ProductComposer/composer
PublishedJul 8, 2026
First seenJul 8, 2026
Weakness typeCWE-532CWE-532
How to fix
Update
- composer/composer2.10.2, 2.2.29 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| composer/composerPackagist | 2.3.0 ≤ v < 2.10.2, 1.0.0 ≤ v < 2.2.29 | 2.10.2, 2.2.29 |
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