What is GHSA-8h74-w38m-j62j?

GHSA-8h74-w38m-j62j is a security advisory published by GitHub Security Advisories with High severity. commonmark versions from 1.5.0 before 2.10.0 contain a denial of service vulnerability in the...

Which CVE IDs does GHSA-8h74-w38m-j62j cover?

GHSA-8h74-w38m-j62j covers the following CVE IDs: CVE-2026-86428. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-8h74-w38m-j62j?

GHSA-8h74-w38m-j62j has a CVSS v3 base score of 7.5, published by GitHub Security Advisories.

GHSA-8h74-w38m-j62jHighCVSS 7.5

commonmark versions from 1.5.0 before 2.10.0 contain a denial of service vulnerability in the...

Vendor

GitHub Security Advisories

Published

September 7, 2026

Last Modified

September 7, 2026

🔗 CVE IDs covered (1)

CVE-2026-86428 →

📋 Description

commonmark versions from 1.5.0 before 2.10.0 contain a denial of service vulnerability in the AttributesExtension when processing distinctly-named attributes. Attackers can submit Markdown with numerous distinct attribute names to cause quadratic-time attribute merging and filtering, consuming disproportionate CPU resources and preventing legitimate requests from completing.

🔗 References (4)

https://github.com/thephpleague/commonmark/security/advisories/GHSA-8rr7-cvq3-gmfh
https://nvd.nist.gov/vuln/detail/CVE-2026-86428
https://www.vulncheck.com/advisories/commonmark-1.5.0-before-2.10.0-denial-of-service-via-attributes
https://github.com/advisories/GHSA-8h74-w38m-j62j