CVE-2026-59947

MEDIUMPre-NVD 4.74.7
EchelonGraph scoreLOW confidence

This medium-severity CVE scores 4.7 under the CNA's CVSS (NVD's own analysis pending). EPSS exploit-prediction score not yet available (the EPSS model rescores nightly; freshly-published CVEs typically appear within 48 hours). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: cna:github_m
4.7
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: —CVSS: 4.7Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
4.7
EG Score
4.7(low)
EPSS
—
KEV
Not listed

Published

July 8, 2026

Last Modified

July 8, 2026

Advisory Details (5)

Auto-updated Jul 8, 2026
Patch available. Sources: github_commit, github_release, github.
github Patch Available

URL-embedded HTTP-Basic username leaks to verbose logs (GitHub PAT exposure) · Advisory · composer/composer · GitHub

https://github.com/composer/composer/security/advisories/GHSA-g6xq-892h-64w3
github_release Patch Available

2.2.29

Patch available: composer/composer 2.2.29

https://github.com/composer/composer/releases/tag/2.2.29
github_release Patch Available

2.10.2

Patch available: composer/composer 2.10.2

https://github.com/composer/composer/releases/tag/2.10.2
github_commit Patch Available

commit 8887ad76fbd8 (composer/composer)

Patch available: composer/composer 2.10.2 (contains commit 8887ad76fbd8)

https://github.com/composer/composer/commit/8887ad76fbd830cb1861a2b1fd8ead78ed1fa1ec
github_commit Patch Available

commit 6bd66874ae52 (composer/composer)

Patch available: composer/composer 2.2.29 (contains commit 6bd66874ae52)

https://github.com/composer/composer/commit/6bd66874ae523ecb69aca5964487a0cdfda03ef8

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 2× in last 7d / 2× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-08 19:46 UTCEG score recompute
  2. 2026-07-08 19:44 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(4)

What is CVE-2026-59947?
CVE-2026-59947 is a medium vulnerability published on July 8, 2026. 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…
When was CVE-2026-59947 disclosed?
CVE-2026-59947 was first published in the National Vulnerability Database on July 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
What is the CVSS score of CVE-2026-59947?
CVE-2026-59947 has a CVSS v3 base score of 4.7 (NVD). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2026-59947?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-59947, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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