CVE-2026-7541
MEDIUM EPSS 30.7%
Published May 7, 20261mo ago · Modified Jun 17, 20261w ago
6.3 CVSS 4.0
Published May 7, 2026 1mo ago
Last Modified Jun 17, 2026 1w ago
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 Details
Base Score
Exploitability
Impact
Vector string
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:U/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 Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X
Threat Intelligence
EPSS Exploit Probability
30.7% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-770
Affected Products 5
References 5
- docs.github.com 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 https://docs.github.com/en/enterprise-server@3.19/admin/release-notes#3.19.6
- docs.github.com https://docs.github.com/en/enterprise-server@3.20/admin/release-notes#3.20.2
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.