What is GHSA-h98w-84rc-h77q?

GHSA-h98w-84rc-h77q is a security advisory published by GitHub Security Advisories with High severity. Mistune from 3.0.0 before 3.3.0 contains an algorithmic complexity vulnerability in the inline...

Which CVE IDs does GHSA-h98w-84rc-h77q cover?

GHSA-h98w-84rc-h77q covers the following CVE IDs: CVE-2026-115348. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-h98w-84rc-h77q?

GHSA-h98w-84rc-h77q has a CVSS v3 base score of 7.5, published by GitHub Security Advisories.

GHSA-h98w-84rc-h77qHighCVSS 7.5

Mistune from 3.0.0 before 3.3.0 contains an algorithmic complexity vulnerability in the inline...

Vendor

GitHub Security Advisories

Published

October 22, 2026

Last Modified

October 22, 2026

🔗 CVE IDs covered (1)

CVE-2026-115348 →

📋 Description

Mistune from 3.0.0 before 3.3.0 contains an algorithmic complexity vulnerability in the inline link parser's parse_link_text function that allows unauthenticated attackers to exhaust CPU with unbalanced brackets. Attackers can submit Markdown containing many unbalanced '[' or '![' characters, forcing repeated unbounded forward scans and tying up worker processes for minutes.

🔗 References (4)

https://github.com/lepture/mistune/security/advisories/GHSA-x2gr-6qf2-fc9x
https://nvd.nist.gov/vuln/detail/CVE-2026-115348
https://www.vulncheck.com/advisories/mistune-before-3.3.0-quadratic-time-dos-via-parse-link-text
https://github.com/advisories/GHSA-h98w-84rc-h77q