CVE catalog
CVE-2026-7541
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 pa
- Severity
- Medium · CVSS 6.3
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 - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.39% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Cpe | enterprise_server | Not reported | 3.16.18 | fixed |
| Cpe | enterprise_server | Not reported | 3.17.15 | fixed |
| Cpe | enterprise_server | Not reported | 3.18.9 | fixed |
| Cpe | enterprise_server | Not reported | 3.19.6 | fixed |
| Cpe | enterprise_server | Not reported | 3.20.2 | fixed |
| Cpe | enterprise_server | Not reported | 3.20.2 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Cpe | enterprise_server | cpe | Not reported | 3.16.18 | Not reported | Not reported | Not reported |
| Cpe | enterprise_server | cpe | Not reported | 3.17.15 | Not reported | Not reported | Not reported |
| Cpe | enterprise_server | cpe | Not reported | 3.18.9 | Not reported | Not reported | Not reported |
| Cpe | enterprise_server | cpe | Not reported | 3.19.6 | Not reported | Not reported | Not reported |
| Cpe | enterprise_server | cpe | Not reported | 3.20.2 | Not reported | Not reported | Not reported |
| Cpe | enterprise_server | cpe | Not reported | 3.20.2 | Not reported | NVD-CVE-2026-7541 | Not reported |
OpenFactory catalog packages
No matching packages in this catalog.
Observed:
References
- [https://docs.github.com/en/enterprise-server@3.16/admin/release-notes#3.16.18]
- [https://docs.github.com/en/enterprise-server@3.17/admin/release-notes#3.17.15]
- [https://docs.github.com/en/enterprise-server@3.18/admin/release-notes#3.18.9]
- [https://docs.github.com/en/enterprise-server@3.19/admin/release-notes#3.19.6]
- [https://docs.github.com/en/enterprise-server@3.20/admin/release-notes#3.20.2]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-7541]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-1432.json]
[CERT-Bund public advisories] · [FIRST EPSS] · [National Vulnerability Database (NVD)]