CVE-2025-6497mediumCWE-617

CVE-2025-6497: medium-severity vulnerability in HTACG tidy-html5

HTACG tidy-html5 parser.c prvTidyParseNamespace assertion

Published

Follow this CVE+ Monitor tidy-html5+ Monitor tidy-html5

E-mail alert when it lands in KEV, gets a public PoC or its score goes up.

13Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 4.8epss 0.2%
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.
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
Affected products
HTACG · tidy-html5
Related CVEs — HTACG tidy-html5

In the same product, most dangerous first.

CVE-2025-6498MEDIUMHTACG tidy-html5 alloc.c defaultAlloc memory leakEPSS 0.2%CVE-2025-6496MEDIUMHTACG tidy-html5 parser.c InsertNodeAsParent null pointer dereferenceEPSS 0.2%