CVE-2026-7541Denial of service vulnerability in GitHub Enterprise Server allowed service disruption via unauthenticated API endpoint
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No exploitation reported and no EPSS estimate yet.
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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
- 6.3 MEDIUM (v4.0, CNA)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
- Weakness (CWE)
- CWE-770
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_P
- NVD analysis
- Analyzed
- Record last updated
- May 8, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
GitHub Enterprise Server github:enterprise_server (from the name) | from 3.16.0 through 3.16.17; fixed at 3.16.18; from 3.17.0 through 3.17.14; fixed at 3.17.15; from 3.18.0 through 3.18.8; fixed at 3.18.9; from 3.19.0 through 3.19.5; fixed at 3.19.6; from 3.20.0 through 3.20.1; fixed at 3.20.2 | CNA record |
github enterprise_server github:enterprise_server | before 3.16.18; from 3.17.0 before 3.17.15; from 3.18.0 before 3.18.9; from 3.19.0 before 3.19.6; from 3.20.0 before 3.20.2 | NVD |
References
- https://docs.github.com/en/enterprise-server@3.16/admin/release-notes#3.16.18release-notes, vendor-advisory
- https://docs.github.com/en/enterprise-server@3.17/admin/release-notes#3.17.15release-notes, vendor-advisory
- https://docs.github.com/en/enterprise-server@3.18/admin/release-notes#3.18.9release-notes, vendor-advisory
- https://docs.github.com/en/enterprise-server@3.19/admin/release-notes#3.19.6release-notes, vendor-advisory
- https://docs.github.com/en/enterprise-server@3.20/admin/release-notes#3.20.2release-notes, vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.