CVE-2026-59710

showdown contains a stored cross-site scripting vulnerability in the parseHeaders function of src/subParsers/makehtml/tables.js that fails to properly escape table header ID attributes. Attackers can inject arbitrary HTML and script-executing SVG elements through double-quote characters in markdo...

RSEC-2023-6 Denial of Service (DoS) vulnerability

The commonmark package, specifically in its dependency on GitHub Flavored Markdown before version 0.29.0.gfm.1, has a vulnerability related to time complexity. Parsing certain crafted markdown tables can take On n time, leading to potential Denial of Service attacks. This issue does not affect th...

cmark-gfm: Exponential time to parse certain inputs could lead to DoS

The table extension in GitHub Flavored Markdown before version 0.29.0.gfm.1 takes On n time to parse certain inputs. An attacker could craft a markdown table which would take an unreasonably long time to process, causing a denial of service. This issue does not affect the upstream cmark project...