What is GHSA-8xqv-hm62-6r4g?

GHSA-8xqv-hm62-6r4g is a security advisory published by GitHub Security Advisories with High severity. Mistune before 3.3.0 contains an inefficient algorithmic complexity vulnerability in...

Which CVE IDs does GHSA-8xqv-hm62-6r4g cover?

GHSA-8xqv-hm62-6r4g covers the following CVE IDs: CVE-2026-115347. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-8xqv-hm62-6r4g?

GHSA-8xqv-hm62-6r4g has a CVSS v3 base score of 7.5, published by GitHub Security Advisories.

GHSA-8xqv-hm62-6r4gHighCVSS 7.5

Mistune before 3.3.0 contains an inefficient algorithmic complexity vulnerability in...

Vendor

GitHub Security Advisories

Published

October 22, 2026

Last Modified

October 22, 2026

🔗 CVE IDs covered (1)

CVE-2026-115347 →

📋 Description

Mistune before 3.3.0 contains an inefficient algorithmic complexity vulnerability in parse_link_text that allows remote attackers to cause denial of service through unbalanced square brackets. Attackers can submit markdown containing long runs of unmatched brackets to mistune.html(), triggering repeated forward scans that stall worker processes for minutes.

🔗 References (4)

https://github.com/lepture/mistune/security/advisories/GHSA-f32h-38gf-rg5r
https://nvd.nist.gov/vuln/detail/CVE-2026-115347
https://www.vulncheck.com/advisories/mistune-before-3.3.0-quadratic-denial-of-service-via-parse-link-text
https://github.com/advisories/GHSA-8xqv-hm62-6r4g