CVE-2026-8829

[CVE catalog]

Severity

High · CVSS 7.5

Published

Jun 4, 2026, 12:00:00 AM UTC

Source

[NVD] · [CVE record]

EPSS

0.41% · Oct 25, 2026

HTML::Entities versions before 3.84 for Perl read freed heap memory in _decode_entities. The XS routine backing HTML::Entities::_decode_entities cached a pointer (repl) into the entity-value SV returned by hv_fetch on the entity2char hash. When the input SV was identical to a value SV in that hash, and that value contained its own key as an entity reference, a later call to grow_gap() reallocated the SV's PV buffer and freed the backing allocation that repl still pointed into. The subsequent copy loop read repl_len bytes from the freed allocation. The read may disclose adjacent heap contents into the destination SV.