CVE-2022-21670

CVE-2022-21670 affects the markdown-it Markdown parser. The vulnerability arises from handling of special patterns with length over 50,000 characters, which can cause significant slowdown (denial of service) in affected versions. The issue is addressed by upgrading to version 12.3.2 ; there are n...

CVE-2015-3295

markdown-it before 4.1.0 does not block data: URLs, enabling potential HTML injection when rendering user-provided content. Affected: markdown-it versions prior to 4.1.0. Root cause: failure to block data: URLs in the rendering process. Impact: authoring or rendering content could lead to uninten...

CVE-2026-48988

markdown-it is affected by a Denial-of-Service vulnerability (CVE-2026-48988) when typographer: true is enabled. Versions 14.1.1 and earlier process smartquotes with a quadratic time complexity due to repeated uses of replaceAt(), causing high CPU usage on quote-heavy inputs. The issue can degrad...