Insertion of Sensitive Information into Log File Affecting composer/composer package, versions <2.2.29>=2.3.0-RC1, <2.10.2
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-PHP-COMPOSERCOMPOSER-17906527
- published9 Jul 2026
- disclosed8 Jul 2026
- creditIlia Alshanetsky
Introduced: 8 Jul 2026
NewCVE-2026-59947 (opens in a new tab)How to fix?
Upgrade composer/composer to version 2.2.29, 2.10.2 or higher.
Overview
composer/composer is a Dependency Manager for PHP. Composer helps you declare, manage and install dependencies of PHP projects. It ensures you have the right stack everywhere.
Affected versions of this package are vulnerable to Insertion of Sensitive Information into Log File in the AuthHelper, Url::sanitize, and ProcessExecutor. An attacker can obtain sensitive credentials by accessing verbose debug logs that inadvertently expose URL-embedded HTTP-Basic usernames.