SB20260925231 - Link following in GitHub Desktop

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Main Vulnerability Database SB20260925231

SB20260925231 - Link following in GitHub Desktop

Published: September 25, 2026

Security Bulletin ID SB20260925231
CSH Severity
High
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

High 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Link following (CVE-ID: N/A)

CWE-ID: CWE-59 - Improper Link Resolution Before File Access ('Link Following')

CVSSv4: 7.5 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to execute commands with the user's privileges.

The vulnerability exists due to improper link resolution before file access in the repository-root .gitignore handling helper when processing repository-derived ignore rules. A remote attacker can provide a repository containing a root .gitignore symbolic link and crafted path data to cause content to be appended to a file outside the clone.

Exploitation requires the user to invoke an affected ignore action, symbolic-link support to be enabled, and another application to interpret the modified external file.


Remediation

Install update from vendor's website.

References