CVE-2026-8829

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.

Objects of the HTML::Parser class will recognize markup and separate it from plain text (alias data content) in HTML documents. As different kinds of markup and text are recognized, the corresponding event handlers are invoked.

Security Fix(es):

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.(CVE-2026-8829)

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.

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.

HTML::Entities versions before 3.84 for Perl read freed heap memory in _decode_entities. (CVE-2026-8829)

These are all security issues fixed in the perl-HTML-Parser-3.850.0-1.1 package on the GA media of openSUSE Tumbleweed.

This update for perl-HTML-Parser fixes the following issue

• CVE-2026-8829: HTML:Entities versions before 3.84 for Perl read freed heap memory in _decode_entities (bsc#1267606).

This update for perl-HTML-Parser fixes the following issue

• CVE-2026-8829: HTML:Entities versions before 3.84 for Perl read freed heap memory in _decode_entities (bsc#1267606).

This update for perl-HTML-Parser fixes the following issue

• CVE-2026-8829: HTML:Entities versions before 3.84 for Perl read freed heap memory in _decode_entities (bsc#1267606).

This update for perl-HTML-Parser fixes the following issue

• CVE-2026-8829: HTML:Entities versions before 3.84 for Perl read freed heap memory in _decode_entities (bsc#1267606).

It was discovered that HTML-Parser incorrectly handled entity references when the input string was identical to an entity value in the lookup table. An attacker could possibly use this issue to obtain sensitive information.