SB2026092905 - Out-of-bounds write in Git for Windows

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Main Vulnerability Database SB2026092905

SB2026092905 - Out-of-bounds write in Git for Windows

Published: September 29, 2026 Updated: September 30, 2026

Security Bulletin ID SB2026092905
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Out-of-bounds write (CVE-ID: CVE-2026-100408)

CWE-ID: CWE-787 - Out-of-bounds write

CVSSv4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to cause a denial of service and prevent rejected credentials from being deleted.

The vulnerability exists due to an out-of-bounds write in the match_cred_password function of git-credential-wincred when processing an erase request containing a password field. A remote attacker can cause a victim to process an erase request containing a password field to cause a denial of service and prevent rejected credentials from being deleted.

Exploitation requires git-credential-wincred to be configured as a credential helper and a matching git credential to exist in Windows Credential Manager.


Remediation

Install update from vendor's website.

References