PT-2026-60781 · Github · Enterprise Server

Stanislav Valkanov · CVE-2026-15007 · Published 2026-07-17 · Updated 2026-07-17

Mitre

CVSS v4.0

5.7

Medium

Base vector

AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:U

A denial of service vulnerability was identified in GitHub Enterprise Server that allowed an authenticated user to cause service disruption by supplying a repository release notes configuration file containing deeply nested YAML. When release notes were generated, the configuration file was parsed without a nesting depth limit, causing excessive resource consumption that could render the instance unresponsive. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.22 and was fixed in versions 3.17.18, 3.18.12, 3.19.9, 3.20.5, and 3.21.3. This vulnerability was reported via the GitHub Bug Bounty program.

Fix

Allocation of Resources Without Limits

Weakness Enumeration

CWE-770

Related Identifiers

CVE-2026-15007

Affected Products

Enterprise Server

References · 6

• https://nvd.nist.gov/vuln/detail/CVE-2026-15007 · Security Note
• https://docs.github.com/en/enterprise-server@3.18/admin/release-notes#3.18.12 · Note
• https://docs.github.com/en/enterprise-server@3.17/admin/release-notes#3.17.18 · Note
• https://docs.github.com/en/enterprise-server@3.19/admin/release-notes#3.19.9 · Note
• https://docs.github.com/en/enterprise-server@3.20/admin/release-notes#3.20.5 · Note
• https://docs.github.com/en/enterprise-server@3.21/admin/release-notes#3.21.3 · Note