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MEDIUM

CVE-2026-25934

CVSS v3

4.3

MEDIUM

EPSS Score

0.2 %

exploit probability, as of 2026-10-19

CISA KEV

No

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

  • github.com/go-git/go-gitGoall versions · no fixed version listedand 1 other package
  • github.com/go-git/go-git/v5Goall versions · fixed in 5.16.5

Vendor advisories

  • CVE-2026-25934 Red Hat Product Security108 products fixed · 195 known affected

    go-git/go-git: go-git: Data integrity issue due to improper verification of pack and index files

    assisted/agent-preinstall-image-builder-rhel9 as a component of Assisted Installer for Red Hat OpenShift Container Platform 2 · openshift-builds/openshift-builds-controller-rhel9 as a component of Builds for Red Hat OpenShift · openshift-builds/openshift-builds-git-cloner-rhel9 as a component of Builds for Red Hat OpenShift

  • RHSA-2026:37387 Red Hat Product Security108 products fixed

    Red Hat Security Advisory: Red Hat OpenShift Data Foundation 4.22.0 security, enhancement & bug fix update

Full record on NVD

Description

go-git is a highly extensible git implementation library written in pure Go. Prior to 5.16.5, a vulnerability was discovered in go-git whereby data integrity values for .pack and .idx files were not properly verified. This resulted in go-git potentially consuming corrupted files, which would likely result in unexpected errors such as object not found. For context, clients fetch packfiles from upstream Git servers. Those files contain a checksum of their contents, so that clients can perform integrity checks before consuming it. The pack indexes (.idx) are generated locally by go-git, or the git cli, when new .pack files are received and processed. The integrity checks for both files were not being verified correctly. This vulnerability is fixed in 5.16.5.

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Published
2026-02-09
Last Modified
2026-02-20

Frequently asked questions

What is CVE-2026-25934?

go-git is a highly extensible git implementation library written in pure Go. Prior to 5.16.5, a vulnerability was discovered in go-git whereby data integrity values for .pack and .idx files were not properly verified. This resulted in go-git potentially consuming corrupted files, which would likely result in unexpected errors such as object not found. For context, clients fetch packfiles from upstream Git servers. Those files contain a checksum of their contents, so that clients can perform integrity checks before consuming it. The pack indexes (.idx) are generated locally by go-git, or the git cli, when new .pack files are received and processed. The integrity checks for both files were not being verified correctly. This vulnerability is fixed in 5.16.5.

Is CVE-2026-25934 actively exploited?

Active exploitation of CVE-2026-25934 has not been confirmed. Its EPSS score was 0.2% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-25934?

CVE-2026-25934 has a CVSS v3 base score of 4.3 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N.

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