MEDIUM

CVE-2026-59947

CVSS v3

4.7

MEDIUM

EPSS Score

0.1 %

exploit probability, as of 2026-10-19

CISA KEV

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

composerBitnamifrom 1.0.0 · fixed in 2.2.29
composer/composerPackagistfrom 1.0.0 · fixed in 2.2.29

Vendor advisories

CVE-2026-59947 Red Hat Product Security
composer/composer: Composer: Information disclosure of credentials via debug output

Full record on 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.

Technical details

CVSS v3 Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Published: 2026-07-08
Last Modified: 2026-07-08
GitHub Advisory: GHSA-g6xq-892h-64w3

Frequently asked questions

What is CVE-2026-59947?

Is CVE-2026-59947 actively exploited?

Active exploitation of CVE-2026-59947 has not been confirmed. Its EPSS score was 0.1% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-59947?

CVE-2026-59947 has a CVSS v3 base score of 4.7 (MEDIUM severity), with vector string CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N.

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