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OpenAdvisories
High · 8.7 Public exploit CVE-2026-3854 EUVD-2026-10744GHSA-64fw-jx9p-5j24

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

Published Mar 10, 2026 · Updated Apr 29, 2026 · Assigned by GitHub_P

Vendor: GitHub Product: Enterprise Server

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

VendorProductAffectedFixed
GitHub Enterprise Server 3.14.0 – ≤ 3.14.24, 3.15.0 – ≤ 3.15.19, 3.16.0 – ≤ 3.16.15, 3.17.0 – ≤ 3.17.12, 3.18.0 – ≤ 3.18.6, 3.19.0 – ≤ 3.19.3 —

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

GitHub 7 repositories

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

Advisories 1

References