CVE-2026-3854An 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 t…
Updated under an hour ago ()
Does this affect you?
It affects github enterprise_server. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
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.
- CVSS
- 8.8 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-77
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Modified
- Record last updated
- Jun 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
github enterprise_server github:enterprise_server | before 3.14.24; from 3.15.0 before 3.15.19; from 3.16.0 before 3.16.15; from 3.17.0 before 3.17.12; from 3.18.0 before 3.18.6; from 3.19.0 before 3.19.3 | NVD |
References
- https://docs.github.com/en/enterprise-server@3.14/admin/release-notes#3.14.25
- https://docs.github.com/en/enterprise-server@3.15/admin/release-notes#3.15.20
- https://docs.github.com/en/enterprise-server@3.16/admin/release-notes#3.16.16
- https://docs.github.com/en/enterprise-server@3.17/admin/release-notes#3.17.13
- https://docs.github.com/en/enterprise-server@3.18/admin/release-notes#3.18.7
- https://docs.github.com/en/enterprise-server@3.19/admin/release-notes#3.19.4
- https://www.wiz.io/blog/github-rce-vulnerability-cve-2026-3854
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.