Security Advisory

CVE-2026-59710

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-07-06 21:15:45

Last updated 2026-07-07 13:47:54

Assigner VulnCheck

CVSS score 5.3

State PUBLISHED

Description

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 markdown table headers, achieving stored XSS when untrusted markdown is rendered with the default github flavor configuration.

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