What’s Vulnerable › Vulnerabilities

CVE-2025-6496: HTACG tidy-html5 parser.c InsertNodeAsParent null pointer dereference

• Severity: low (CVSS 3.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-06-23 · updated 2026-06-17
• Weakness: CWE-404

Description

A vulnerability was found in HTACG tidy-html5 5.8.0. It has been declared as problematic. This vulnerability affects the function InsertNodeAsParent of the file src/parser.c. The manipulation leads to null pointer dereference. Local access is required to approach this attack. The exploit has been disclosed to the public and may be used.

Affected products

• HTACG tidy-html5: 5.8.0

References

• https://github.com/htacg/tidy-html5/issues/1141
• https://github.com/user-attachments/files/19652942/tidy-html5_crash.txt
• https://vuldb.com/?ctiid.313612
• https://vuldb.com/?id.313612
• https://vuldb.com/?submit.601007

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