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TI-2026-08360 Aliases CVE-2026-9516GHSA-32gp-2g42-v9vc

Improper handling of exceptional conditions in RURBAN Cpanel::JSON::XS

Priority LOW 39CWE-755Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · None · High
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 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. When that scalar is later freed, the allocator receives an invalid pointer and the interpreter aborts. A single BOM prefixed document decoded with a throwing filter callback crashes any caller.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00361 30th 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-2026-08187 Type confusion in RURBAN Cpanel::JSON::XSPriority LOW 38
    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-2026-9516
  2. 2026-10-03 Alias added: GHSA-32gp-2g42-v9vc
  3. 2026-10-25 Priority changed: MEDIUM → LOW

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-2026-08187 Type confusion in RURBAN Cpanel::JSON::XS CVSS 3.1HIGH 7.3

Sources

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