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CVE-2026-7541

Denial of service vulnerability in GitHub Enterprise Server allowed service disruption via unauthenticated API endpoint

Published: May 7, 2026Updated: May 11, 2026 Sources: CVE List NVDCWE-770
NVD MITRE
7.5CVSSHIGH
EPSS Score
0.4%
Top 71.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

A denial of service vulnerability was identified in GitHub Enterprise Server that allowed an unauthenticated attacker to cause service disruption by sending crafted requests with deeply nested JSON payloads to an unauthenticated API endpoint. The endpoint parsed user-controlled JSON request bodies without size or depth limits, causing excessive CPU and memory consumption. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.21 and was fixed in versions 3.20.2, 3.19.6, 3.18.9, 3.17.15, and 3.16.18. This vulnerability was reported via the GitHub Bug Bounty program.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-770

Affected Products

Enterprise ServerGitHubDevTools & CI
enterprise servergithubDevTools & CI
githubcommercialUSDevTools & CIaka github

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Impact
View detailed technique mapping

References

https://docs.github.com/en/enterprise-server@3.16/admin/release-notes#3.16.18
docs.github.com
https://docs.github.com/en/enterprise-server@3.17/admin/release-notes#3.17.15
docs.github.com
https://docs.github.com/en/enterprise-server@3.18/admin/release-notes#3.18.9
docs.github.com
and 2 more references View all →

Timeline

Published
May 7, 2026
Last Updated
May 11, 2026

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