markdown-it: Quadratic complexity in smartquotes with unmatched closing quotes
High-risk advisory
CVE-2026-111759
Summary
markdown-it: Quadratic complexity in smartquotes with unmatched closing quotes
Why it matters
GitHub has published a reviewed security advisory for markdown-it. Prioritize it with other application dependency updates, especially because EPSS places it in the 48% percentile.
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. EPSS probability: 0.6%; percentile: 48%.
Sources
PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.