markdown-it: Quadratic-time rendering of a single multi-line link reference definition with default options (regressi...
High-risk advisory
CVE-2026-111758
Summary
markdown-it: Quadratic-time rendering of a single multi-line link reference definition with default options (regression since 14.0)
Why it matters
GitHub has published a reviewed security advisory for markdown-it. Prioritize it with other application dependency updates.
Operator check
Check whether markdown-it is present in application dependency manifests, lockfiles, or build images. Review the GitHub advisory and upgrade to a patched version where available.
Sources
PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.