🔐 CVE Alert

CVE-2026-15007

UNKNOWN 0.0

Denial of service vulnerability in GitHub Enterprise Server allowed service disruption via deeply nested YAML in release notes configuration

CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th

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.

CWE CWE-770
Vendor github
Product enterprise server
Ecosystems
Industries
Technology
Published Jul 17, 2026
Last Updated Jul 17, 2026
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Affected Versions

GitHub / Enterprise Server
3.17.0 ≤ 3.17.17 3.18.0 ≤ 3.18.11 3.19.0 ≤ 3.19.8 3.20.0 ≤ 3.20.4 3.21.0 ≤ 3.21.2

References

NVD ↗ CVE.org ↗ EPSS Data ↗
docs.github.com: https://docs.github.com/en/[email protected]/admin/release-notes#3.17.18 docs.github.com: https://docs.github.com/en/[email protected]/admin/release-notes#3.18.12 docs.github.com: https://docs.github.com/en/[email protected]/admin/release-notes#3.19.9 docs.github.com: https://docs.github.com/en/[email protected]/admin/release-notes#3.20.5 docs.github.com: https://docs.github.com/en/[email protected]/admin/release-notes#3.21.3

Credits

Stanislav Valkanov (GitHub: svalkanov)