Description
Cpanel::JSON::XS versions before 4.80 for Perl use the parent interpreter's scalars from a parser object cloned into a new ithread.

A parser object holds its callbacks and its incremental parse buffer as raw scalar pointers. When a thread is created, these are copied into the new interpreter unchanged, so the child's parser uses, and later frees, scalars that belong to the parent and may already have been freed there.

A parser created before a thread starts and used inside it can call freed callbacks, corrupt reference counts and crash the process.
Published: 2026-10-19
Score: 8.1 High
EPSS: < 1% Very Low
KEV: No
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

Vendor Solution

Upgrade to Cpanel-JSON-XS 4.80 or later.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

History

Fri, 30 Oct 2026 12:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Fri, 30 Oct 2026 11:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H'}


Mon, 19 Oct 2026 21:00:00 +0000

Type Values Removed Values Added
First Time appeared Rurban
Rurban cpanel::json::xs
Vendors & Products Rurban
Rurban cpanel::json::xs

Mon, 19 Oct 2026 18:30:00 +0000

Type Values Removed Values Added
Description Cpanel::JSON::XS versions before 4.80 for Perl use the parent interpreter's scalars from a parser object cloned into a new ithread. A parser object holds its callbacks and its incremental parse buffer as raw scalar pointers. When a thread is created, these are copied into the new interpreter unchanged, so the child's parser uses, and later frees, scalars that belong to the parent and may already have been freed there. A parser created before a thread starts and used inside it can call freed callbacks, corrupt reference counts and crash the process.
Title Cpanel::JSON::XS versions before 4.80 for Perl use the parent interpreter's scalars from a parser object cloned into a new ithread
Weaknesses CWE-416
References

Subscriptions

Rurban Cpanel::json::xs
cve-icon MITRE

Status: PUBLISHED

Assigner: CPANSec

Published:

Updated: 2026-10-30T11:04:48.764Z

Reserved: 2026-10-14T13:25:47.112Z

Link: CVE-2026-110681

cve-icon Vulnrichment

Updated: 2026-10-30T11:04:30.497Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-19T19:17:21.767

Modified: 2026-10-30T11:17:31.840

Link: CVE-2026-110681

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-30T12:45:12Z

Weaknesses