CVE-2025-6497: Htacg Tidy-HTML5

Low severity, CVSS 3.3. EPSS: 0.2% chance of exploitation in the next 30 days.

A vulnerability was found in HTACG tidy-html5 5.8.0. It has been rated as problematic. This issue affects the function prvTidyParseNamespace of the file src/parser.c. The manipulation leads to reachable assertion. Attacking locally is a requirement. The exploit has been disclosed to the public and may be used.

Affected products

• Htacg Tidy-HTML5: version 5.8.0 only

Published 2025-06-23. Last modified 2026-06-17.