SEPTEMBER 20, 2026
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Case File

CVE-2026-59947

MEDIUM · CVSS 4.7 EPSS 0.12% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-07-08 · Last synced 2026-08-07

CyberRota Analysis

AI-Generated

Composer versions prior to 2.2.29 and 2.10.2 are vulnerable to exposing sensitive credentials, such as GitHub Personal Access Tokens, in debug output when run with high verbosity. This could lead to unauthorized access if these tokens are inadvertently shared or logged. Developers and organizations using Composer for PHP dependency management should prioritize upgrading to the latest versions to mitigate this risk.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-59947
Severity
MEDIUM
CVSS
4.7
EPSS
0.12%
GitHub

Original NVD 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.