PT-2026-24344 · Github · Github Enterprise Server

Published

2026-03-10

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Updated

2026-04-28

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CVE-2026-3854

CVSS v3.1

8.8

High

AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Name of the Vulnerable Software and Affected Versions GitHub Enterprise Server versions 3.14.24, 3.15.19, 3.16.15, 3.17.12, 3.18.6 and 3.19.3
Description An improper neutralization of special elements issue 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. The internal header format used a delimiter character that could also appear in user input, allowing an attacker to inject additional metadata fields through crafted push option values. This issue was reported through the GitHub Bug Bounty program.
Recommendations Update to GitHub Enterprise Server version 3.14.24. Update to GitHub Enterprise Server version 3.15.19. Update to GitHub Enterprise Server version 3.16.15. Update to GitHub Enterprise Server version 3.17.12. Update to GitHub Enterprise Server version 3.18.6. Update to GitHub Enterprise Server version 3.19.3.

Fix

RCE

Command Injection

Weakness Enumeration

CWE-77

Related Identifiers

CVE-2026-3854

Affected Products

Github Enterprise Server