CVE-2026-59944

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.47% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 40.3% of scored records. A rank, not a probability.

NVD base score

6.1 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N

NVD analysis status

Awaiting Analysis. NVD last modified this record on 2026-09-30.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-09-16 16:09Z1 MO AGO

Last updated

2026-09-16 17:29Z1 MO AGO

Reserved

2026-07-07

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

Medium (CVSS 6.1)

CNA CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N

Weaknesses

• CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')Base
• CWE-59Improper Link Resolution Before File Access ('Link Following')Base

Data version

5.2

Document digest

404c672b08d72042535376e8c2525c4bed412bb8e92fa141f0b50a1f5b1dc626

• github.comhttps://github.com/composer/composer/security/advisories/GHSA-96h3-5x6v-m776x_refsource_CONFIRM
• github.comhttps://github.com/composer/composer/commit/53b8bb4c24697b2f00a18cf1ef35a10392701b89x_refsource_MISC
• github.comhttps://github.com/composer/composer/commit/ad649fdfdf8ed826d4a34e0e5690c76a0b4833aax_refsource_MISC
• github.comhttps://github.com/composer/composer/releases/tag/2.10.3x_refsource_MISC
• github.comhttps://github.com/composer/composer/releases/tag/2.2.30x_refsource_MISC