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EUVD-2026-324451

fkie_cve-2026-9334

Cpanel::JSON::XS versions before 4.41 for Perl allow type confusion via duplicate object keys when dupkeys_as_arrayref is enabled.

decode_hv() collapses duplicate object keys into an array reference under dupkeys_as_arrayref. The branch reached for a duplicate key tests `SvTYPE (old_value) != SVt_RV && SvTYPE (SvRV (old_value)) != SVt_PVAV`, which evaluates SvRV(old_value) before establishing that old_value is a reference. When the existing value is a plain scalar rather than an array reference, a non-reference scalar is dereferenced as a reference.

A caller decoding untrusted JSON with dupkeys_as_arrayref enabled is crashed, and the incompatible access follows a pointer taken from attacker controlled scalar contents.

GHSA-qfqj-xxqv-cxfw

Cpanel::JSON::XS versions before 4.41 for Perl allow type confusion via duplicate object keys when dupkeys_as_arrayref is enabled.

A caller decoding untrusted JSON with dupkeys_as_arrayref enabled is crashed, and the incompatible access follows a pointer taken from attacker controlled scalar contents.

OESA-2026-2588 — perl-Cpanel-JSON-XS security update

Affected: openEuler:24.03-LTS-SP1: perl-Cpanel-JSON-XS

This module converts Perl data structures to JSON and vice versa. Its primary goal is to be correct and its secondary goal is to be fast. To reach the latter goal it was written in C. Security Fix(es):

Cpanel::JSON::XS versions before 4.41 for Perl allow type confusion via duplicate object keys when dupkeys_as_arrayref is enabled.

A caller decoding untrusted JSON with dupkeys_as_arrayref enabled is crashed, and the incompatible access follows a pointer taken from attacker controlled scalar contents.(CVE-2026-9334)

Cpanel::JSON::XS versions before 4.41 for Perl allow denial of service via UTF-8 BOM prefixed input when a decode filter callback throws.

To skip a leading 3-byte UTF-8 BOM, decode_json() advances the input scalar's string pointer past the mark with SvPV_set() and restores it only on the normal return path. When decoding aborts through a Perl exception, for example a filter_json_object callback that croaks, the restore is skipped and the scalar is left with its string pointer offset into its own buffer and a shortened length.…

openSUSE-SU-2026:10950-1 — perl-Cpanel-JSON-XS-4.410.0-1.1 on GA media

perl-Cpanel-JSON-XS-4.410.0-1.1 on GA media

SUSE-SU-2026:2782-1 — Security update for perl-Cpanel-JSON-XS

Security update for perl-Cpanel-JSON-XS

UBUNTU-CVE-2026-9334

Affected: Ubuntu:16.04:LTS: libcpanel-json-xs-perl, Ubuntu:18.04:LTS: libcpanel-json-xs-perl, Ubuntu:20.04:LTS: libcpanel-json-xs-perl, Ubuntu:22.04:LTS: libcpanel-json-xs-perl, Ubuntu:24.04:LTS: libcpanel-json-xs-perl, Ubuntu:25.10: libcpanel-json-xs-perl, Ubuntu:26.04:LTS: libcpanel-json-xs-perl

Cpanel::JSON::XS versions before 4.41 for Perl allow type confusion via duplicate object keys when dupkeys_as_arrayref is enabled. decode_hv() collapses duplicate object keys into an array reference under dupkeys_as_arrayref. The branch reached for a duplicate key tests `SvTYPE (old_value) != SVt_RV && SvTYPE (SvRV (old_value)) != SVt_PVAV`, which evaluates SvRV(old_value) before establishing that old_value is a reference. When the existing value is a plain scalar rather than an array reference, a non-reference scalar is dereferenced as a reference. A caller decoding untrusted JSON with dupkeys_as_arrayref enabled is crashed, and the incompatible access follows a pointer taken from attacker controlled scalar contents.