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CVE-2026-110681

8.1 · HIGH

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

Published Oct 19, 2026CWE-416EPSS 0.43%

Overview

CVE-2026-110681 is a high-severity vulnerability. It was published on October 19, 2026 and has a CVSS 3.1 base score of 8.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/rurban/Cpanel-JSON-XS/commit/c53eefbaa59c344abd4c71762118da04280987e8.patchRefmetacpan.org/release/RURBAN/Cpanel-JSON-XS-4.80/changes

How CyberStrike helps

Frequently asked questions

What is CVE-2026-110681?

CVE-2026-110681 is a high-severity vulnerability. It was published on October 19, 2026 and has a CVSS 3.1 base score of 8.1 (HIGH).

How severe is CVE-2026-110681?

This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-110681?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-110681?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-110681 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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