CVE-2026-110681

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.

CVSS v3 8.1 HIGH

8.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/rurban/Cpanel-JSON-XS/commit/c53eefbaa59c344abd4c71762118da04280987e8.patch
https://metacpan.org/release/RURBAN/Cpanel-JSON-XS-4.80/changes

Configurations

No configuration.

History

30 Oct 2026, 11:17

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 8.1

19 Oct 2026, 19:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-19 19:17

Updated : 2026-10-30 11:17

NVD link : CVE-2026-110681

Mitre link : CVE-2026-110681

CVE.ORG link : CVE-2026-110681

JSON object : View

Products Affected

No product.

CWE

CWE-416

Use After Free

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