CVE-2026-115348 — Mistune before 3.3.0 Quadratic-Time DoS via parse_link_text
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 ex…
Published: 2026-10-22 · CVSS: 8.7 · CVSS 4.0
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.
Source: CVE Program · Revision 0bfcb4a0db026bd19929694234eddc30870130af