What is GHSA-f58g-hmv8-g97m?

GHSA-f58g-hmv8-g97m is a security advisory published by GitHub Security Advisories with Medium severity. commonmark versions from 2.0.0 before 2.8.4 contain a denial of service vulnerability in...

Which CVE IDs does GHSA-f58g-hmv8-g97m cover?

GHSA-f58g-hmv8-g97m covers the following CVE IDs: CVE-2026-86432. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-f58g-hmv8-g97m?

GHSA-f58g-hmv8-g97m has a CVSS v3 base score of 5.3, published by GitHub Security Advisories.

GHSA-f58g-hmv8-g97mMediumCVSS 5.3

commonmark versions from 2.0.0 before 2.8.4 contain a denial of service vulnerability in...

Vendor

GitHub Security Advisories

Published

September 7, 2026

Last Modified

September 7, 2026

🔗 CVE IDs covered (1)

CVE-2026-86432 →

📋 Description

commonmark versions from 2.0.0 before 2.8.4 contain a denial of service vulnerability in XmlRenderer that emits depth-proportional indentation for every XML tag. Attackers can provide deeply nested Markdown or AST structures to cause quadratic memory consumption and output amplification, exhausting server resources.

🔗 References (4)

https://github.com/thephpleague/commonmark/security/advisories/GHSA-mj63-m3rc-8ppr
https://nvd.nist.gov/vuln/detail/CVE-2026-86432
https://www.vulncheck.com/advisories/commonmark-2.0.0-before-2.8.4-denial-of-service-via-xml
https://github.com/advisories/GHSA-f58g-hmv8-g97m