CVE-2026-7541CWE-770

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

Medium · published May 7, 2026

CVSS v4.0
6.3
EPSS
1%
Percentile
50.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
6.3 · MEDIUM
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
EPSS
0.00658 · 50.9th percentile
Weakness
CWE-770 · Allocation of Resources Without Limits or Throttling
Published
2026-05-07T21:18Z
EPSS history
Timeline
  • 07 MAY 21:18Z
    Denial of service vulnerability in GitHub Enterprise Server allowed service disruption via unauthenticated API endpoint
    cvelistv5