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CVE PROGRAM SOURCE RECORD8.7 High

CVE-2026-3854

Remote code execution via git push option injection in GitHub Enterprise Server

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Status
Published
Published
Updated
Assigning organization
GitHub_P

Description

An improper neutralization of special elements vulnerability was identified in GitHub Enterprise Server that allowed an attacker with push access to a repository to achieve remote code execution on the instance. During a git push operation, user-supplied push option values were not properly sanitized before being included in internal service headers. Because the internal header format used a delimiter character that could also appear in user input, an attacker could inject additional metadata fields through crafted push option values. This vulnerability was reported via the GitHub Bug Bounty program and has been fixed in GitHub Enterprise Server versions 3.14.25, 3.15.20, 3.16.16, 3.17.13, 3.18.7 and 3.19.4.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

GitHub Enterprise Server

Default version status: affected

  • 3.14.0 to ≤ 3.14.24affected
  • 3.15.0 to ≤ 3.15.19affected
  • 3.16.0 to ≤ 3.16.15affected
  • 3.17.0 to ≤ 3.17.12affected
  • 3.18.0 to ≤ 3.18.6affected
  • 3.19.0 to ≤ 3.19.3affected

References