Is CVE-2026-9334 actively exploited?

No active exploitation of CVE-2026-9334 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-9334 be exploited remotely?

Yes. CVE-2026-9334 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-9334?

CVE-2026-9334 has a CVSS score of 7.3 (HIGH).

HOME VULNERABILITIESCVE-2026-9334

HIGH

CVE-2026-9334

CWE-843Published: June 3, 2026· Updated: Jun 5, 2026

7.3

CVSS v3.1

EPSS:0.04%probability of exploitation in 30 daysPercentile:11.3th

Official Description

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.

NVD Source

Technical Analysis

CVE-2026-9334 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.