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.

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History

Thu, 07 May 2026 22:45:00 +0000

Type Values Removed Values Added
First Time appeared Github
Github enterprise Server
Vendors & Products Github
Github enterprise Server

Thu, 07 May 2026 21:45:00 +0000

Type Values Removed Values Added
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.
Title Denial of service vulnerability in GitHub Enterprise Server allowed service disruption via unauthenticated API endpoint
Weaknesses CWE-770
References
Metrics cvssV4_0

{'score': 6.3, 'vector': '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'}


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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_P

Published:

Updated: 2026-05-07T21:18:35.655Z

Reserved: 2026-04-30T18:42:48.142Z

Link: CVE-2026-7541

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-05-07T22:16:36.917

Modified: 2026-05-07T22:16:36.917

Link: CVE-2026-7541

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-07T23:00:09Z

Weaknesses