libcpanel-json-xs-perl: Cpanel::JSON::XS versions before 4.41 for Perl allow type confusion via duplicate object keys when dupkeys_as_arrayre...
CVE-2026-9334 is fixed in 2 products on 1 platform, first by OPENSUSE-SU-2026:21140-1, released June 19, 2026. It is not reported as exploited. Patch Radar priority: High.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| libcpanel-json-xs-perl · Debian 14 | 4.41-1 | DEBIAN-CVE-2026-9334 | Jun 24, 2026 |
| perl-Cpanel-JSON-XS · opensuse-leap 16.0 | 4.420.0-bp160.1.1 | OPENSUSE-SU-2026:21140-1 | Jun 19, 2026 |
| perl-Cpanel-JSON-XS · sles 15.7 | 4.800.0-150700.3.9.1 | SUSE-SU-2026:4926-1 | Nov 7, 2026 |
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