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VulnerabilityPublished Updated

CVE-2026-100407: Git for Windows is the Windows port of Git

Affects gitSource GCVE Database

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Authoritative record:CVE-2026-100407· Medium 4.4

Not known to be exploited · CVSS 4.4 Medium · fixed in 2.55.0 : update git when convenient.

Data as of 6 Nov 2026, 05:35 UTC

CVSS 3.1 base score
4.4Medium
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (GitHub_M)CVSS 3.14.4
Patch
Available – fixed in 2.55.0
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 4 Nov 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
Ubuntu 26.10gitpkg:deb/ubuntu/git?arch=source&distro=stonkingOther threatsAffected
  • =1:2.53.0-1ubuntu1
  • =1:2.55.0-1ubuntu1
  • =1:2.55.0-1ubuntu1.1
Fixed in–
Ubuntu 26.04 LTSgitpkg:deb/ubuntu/git?arch=source&distro=resoluteOther threatsAffected
  • =1:2.51.0-1ubuntu1
  • =1:2.53.0-1ubuntu1
  • =1:2.53.0-1ubuntu1.1
Fixed in–
Ubuntu 24.04 LTSgitpkg:deb/ubuntu/git?arch=source&distro=nobleOther threatsAffected
  • 1:2.40.1-1ubuntu1 – 1:2.43.0-1ubuntu7.4
9 affected builds
Fixed in–
Ubuntu 22.04 LTSgitpkg:deb/ubuntu/git?arch=source&distro=jammyOther threatsAffected
  • 1:2.32.0-1ubuntu1 – 1:2.34.1-1ubuntu1.18
19 affected builds
Fixed in–
Ubuntu Pro 20.04 LTSgitpkg:deb/ubuntu/git?arch=source&distro=esm-infra/focalOther threatsAffected
  • 1:2.20.1-2ubuntu1 – 1:2.25.1-1ubuntu3.14+esm6
26 affected builds
Fixed in–
Ubuntu Pro 18.04 LTSgitpkg:deb/ubuntu/git?arch=source&distro=esm-infra/bionicOther threatsAffected
  • 1:2.14.1-1ubuntu4 – 1:2.17.1-1ubuntu0.18+esm8
26 affected builds
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Upgrade Git for Windows to version 2.55.0.windows.3 or later, where this vulnerability is fixed. No other mitigation or workaround is indicated.

Description

A vulnerability in Git for Windows versions from 2.44.0.windows.1 up to 2.55.0.windows.3 causes a heap buffer overflow due to improper sizing of a wide-character credential buffer when both password and oauth_refresh_token are present. This leads to a fixed two-byte NUL overwrite that can cause Windows heap corruption and may result in the git credential approve operation reporting success despite failing to store the OAuth credential. The issue is fixed in version 2.55.0.windows.3.

References

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