CVE-2021-34121: Htmldoc Project Htmldoc

High severity, CVSS 7.8. EPSS: 0.3% chance of exploitation in the next 30 days.

An Out of Bounds flaw was discovered in htmodoc 1.9.12 in function parse_tree() in toc.cxx, this possibly leads to memory layout information leaking in the data. This might be used in a chain of vulnerability in order to reach code execution.

Affected products

Published 2023-07-18. Last modified 2026-06-17.