CVE-2026-3854
Remote code execution via git push option injection in GitHub Enterprise Server
- Published
- Updated
- Reserved
- Assigned by
- 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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_PCNA (assigner) | 4.0 | High8.7 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N |
| NVDNVD · Modified | 4.0 | High8.7 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
- EPSS (exploitation in 30 days)
- 41.9% · top 1.3% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.7.
Weakness
Affected products
- affected 3.14.0 – ≤ 3.14.24
- affected 3.15.0 – ≤ 3.15.19
- affected 3.16.0 – ≤ 3.16.15
- affected 3.17.0 – ≤ 3.17.12
- affected 3.18.0 – ≤ 3.18.6
- affected 3.19.0 – ≤ 3.19.3
References (7)
- https://docs.github.com/en/[email protected]/admin/release-notes#3.14.25 (opens in a new tab)
- https://docs.github.com/en/[email protected]/admin/release-notes#3.15.20 (opens in a new tab)
- https://docs.github.com/en/[email protected]/admin/release-notes#3.16.16 (opens in a new tab)
- https://docs.github.com/en/[email protected]/admin/release-notes#3.17.13 (opens in a new tab)
- https://docs.github.com/en/[email protected]/admin/release-notes#3.18.7 (opens in a new tab)
- https://docs.github.com/en/[email protected]/admin/release-notes#3.19.4 (opens in a new tab)
- https://www.wiz.io/blog/github-rce-vulnerability-cve-2026-3854 (opens in a new tab)technical-description
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-3854)Record last updated .