CVE-2025-6497

HTACG tidy-html5 parser.c prvTidyParseNamespace assertion

CVSS 4.8 MEDIUMEPSS 0.1%CWE-617

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 4.8EPSS 0.1%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

23 Jun 2025Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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

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References

https://github.com/htacg/tidy-html5/issues/1142 https://github.com/user-attachments/files/19825297/tidy-html5_crash_2.txt https://vuldb.com/?ctiid.313613 https://vuldb.com/?id.313613 https://vuldb.com/?submit.601008