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TI-2026-08187 Aliases CVE-2026-9334GHSA-qfqj-xxqv-cxfw

Type confusion in RURBAN Cpanel::JSON::XS

Priority LOW 38CWE-843Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
Low · Low · Low
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00253 16th percentileScored 2026-11-07
Fix Fixed Cpanel::JSON::XS (RURBAN): 4.41

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
RURBANCpanel::JSON::XSbefore 4.414.41Patch availableCNA
  • Cpanel::JSON::XS VendorRURBAN Affected before 4.41 Fixed in 4.41 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:rurban:cpanel\:\:json\:\:xs:*:*:*:*:*:perl:*:* json\VulnerableRURBAN
  • cpe:2.3:a:rurban:cpanel\:\:json\:\:xs:*:*:*:*:*:perl:*:* Versions json\ Vulnerable ·RURBAN

Remediation

  • Fix · CNA Cpanel::JSON::XS (RURBAN) Fixed in 4.41

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    RURBAN Cpanel::JSON::XS 4.41

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2026-08360 Improper handling of exceptional conditions in RURBAN Cpanel::JSON::XSPriority LOW 39
    Show all 2 records →

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-9334
  2. 2026-10-03 Alias added: GHSA-qfqj-xxqv-cxfw

References

Patch 2

Other 1

  • TI-2022-24155 The Cpanel::JSON::XS package before 4.33 for Perl performs out-of-bounds accesses in a… CVSS 3.1CRITICAL 9.1
  • TI-2026-08360 Improper handling of exceptional conditions in RURBAN Cpanel::JSON::XS CVSS 3.1HIGH 7.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences