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CVE-2026-3854— Remote code execution via git push option injection in GitHub Enterprise Server

Quick assessment

Affected
GitHub Enterprise Server
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

GitHub Enterprise Server是美国GitHub开源的一个应用软件。提供一个将自己的GitHub实例设置为虚拟设备，从而提供可扩展，易于管理的平台。 GitHub Enterprise Server 3.14.24版本、3.15.19版本、3.16.15版本、3.17.12版本、3.18.6版本和3.19.3版本存在安全漏洞，该漏洞源于对推送选项值中和不当，可能导致远程代码执行。

AI Predicted 8.1 Difficulty: Moderate EPSS 1.45% · P72

Affected Version Matrix 6

VendorProduct Version RangeStatus
GitHub Enterprise Server 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 affected
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I. Basic Information for CVE-2026-3854

Vulnerability Information
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Vulnerability Title
Remote code execution via git push option injection in GitHub Enterprise Server
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
在命令中使用的特殊元素转义处理不恰当(命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
GitHub Enterprise Server 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
GitHub Enterprise Server是美国GitHub开源的一个应用软件。提供一个将自己的GitHub实例设置为虚拟设备，从而提供可扩展，易于管理的平台。 GitHub Enterprise Server 3.14.24版本、3.15.19版本、3.16.15版本、3.17.12版本、3.18.6版本和3.19.3版本存在安全漏洞，该漏洞源于对推送选项值中和不当，可能导致远程代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
GitHub Enterprise Server 3.14.0 ~ 3.14.24 -

II. Public POCs for CVE-2026-3854

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III. Intelligence Information for CVE-2026-3854

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Vendor Pages for CVE-2026-3854 (6)

Same Patch Batch · GitHub · 2026-03-10 · 4 CVEs total

CVE-2026-3306 Improper authorization in GitHub Projects allows modification of issue and pull request me
CVE-2026-3582 Incorrect Authorization in GitHub Enterprise Server allows access to issue and commit sear
CVE-2026-2266 Improper neutralization of input vulnerability was identified in GitHub Enterprise Server

IV. Related Vulnerabilities

Same product: Enterprise Server
Same vendor: GitHub
Same weakness: CWE-77

V. Comments for CVE-2026-3854

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