Denial of Service Vulnerability in GitHub Enterprise Server
CVE-2026-7541

6.3MEDIUM

Key Information:

Vendor

Github
Status
Enterprise Server
Vendor
CVE Published:
7 May 2026

What is CVE-2026-7541?

A vulnerability in GitHub Enterprise Server was discovered that allows unauthenticated attackers to disrupt service by sending specially crafted requests containing deeply nested JSON payloads to an unsecured API endpoint. This vulnerability results in excessive CPU and memory consumption as the endpoint processes user-controlled JSON request bodies without any size or depth restrictions. All versions prior to 3.21 of GitHub Enterprise Server are impacted. The issue was addressed in subsequent releases which resolved the underlying problems.

Affected Version(s)

Enterprise Server 3.16.0 <= 3.16.17

Enterprise Server 3.16.0 <= 3.16.17

Enterprise Server 3.17.0 <= 3.17.14

References

https://docs.github.com/en/enterprise-server@3.16/admin/r...
release-notes
https://docs.github.com/en/enterprise-server@3.17/admin/r...
release-notes
https://docs.github.com/en/enterprise-server@3.18/admin/r...
release-notes

CVSS V4

Score:
6.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Nguyen Nhat Anh (GitHub: anh2025)
.