CVE-2026-53586

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

0.27% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 19.8% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

NVD analysis status

Awaiting Analysis. NVD last modified this record on 2026-10-26.

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

2026-08-20 18:40Z2 MO AGO

Last updated

2026-08-21 21:46Z2 MO AGO

Reserved

2026-06-09

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

Medium (CVSS 6.5)

CNA CVSS vector

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

Weaknesses

• CWE-200Exposure of Sensitive Information to an Unauthorized ActorClass
• CWE-522Insufficiently Protected CredentialsClass
• CWE-601URL Redirection to Untrusted Site ('Open Redirect')Base
• CWE-201Insertion of Sensitive Information Into Sent DataBase

Data version

5.2

Document digest

645e4b4cfc4d420fe4c392b40a62bd9405fbe4b9d0f4d70cb33b1ec5de54a7dc

• github.comhttps://github.com/libgit2/libgit2/security/advisories/GHSA-2889-x8f6-mc4xx_refsource_CONFIRM
• github.comhttps://github.com/libgit2/libgit2/commit/07de6a7e438f95ac9a6efd3222a82117e871ed27x_refsource_MISC
• github.comhttps://github.com/libgit2/libgit2/commit/af2b29ad0a74d5bac9751376879ddaf848136d3bx_refsource_MISC
• github.comhttps://github.com/libgit2/libgit2/commit/c1507abc44647b3acd832a33a5b1c8c9f5ba8821x_refsource_MISC
• github.comhttps://github.com/libgit2/libgit2/releases/tag/v1.8.6x_refsource_MISC
• github.comhttps://github.com/libgit2/libgit2/releases/tag/v1.9.5x_refsource_MISC