# CVE-2026-110681: libcpanel-json-xs-perl: Cpanel::JSON::XS versions before 4.80 for Perl use the parent interpreter's scalars from a parser object cloned into...

CVE-2026-110681 is fixed in 4 products on 1 platform, first by DEBIAN-CVE-2026-110681, released October 24, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-110681
- Priority: High
- CVSS: 8.1 (high)
- EPSS: 0.0043
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 15, 2026

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libcpanel-json-xs-perl Debian 14 | 4.80-1 | [DEBIAN-CVE-2026-110681](https://patchblox.com/security/data/fix/linux/debian-cve-2026-110681.md) | Oct 24, 2026 |
| Linux | perl-Cpanel-JSON-XS Fedora 43 | 4.80-1.fc43 | [FEDORA-2026-4447E52D23](https://patchblox.com/security/data/fix/linux/fedora-2026-4447e52d23.md) | Nov 7, 2026 |
| Linux | perl-Cpanel-JSON-XS amzn 2023 | 4.25-2.amzn2023.0.10 | [ALAS2023-2026-3352](https://patchblox.com/security/data/fix/linux/alas2023-2026-3352.md) | Nov 7, 2026 |
| Linux | perl-Cpanel-JSON-XS opensuse-leap 16.0 | 4.800.0-bp160.1.1 | [OPENSUSE-SU-2026:22187-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-22187-1.md) | Nov 7, 2026 |
| Linux | perl-Cpanel-JSON-XS sles 15.7 | 4.800.0-150700.3.9.1 | [SUSE-SU-2026:4926-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4926-1.md) | Nov 7, 2026 |
| Linux | perl-Cpanel-JSON-XS-debuginfo Fedora 43 | 4.80-1.fc43 | [FEDORA-2026-4447E52D23](https://patchblox.com/security/data/fix/linux/fedora-2026-4447e52d23.md) | Nov 7, 2026 |
| Linux | perl-Cpanel-JSON-XS-debuginfo amzn 2023 | 4.25-2.amzn2023.0.10 | [ALAS2023-2026-3352](https://patchblox.com/security/data/fix/linux/alas2023-2026-3352.md) | Nov 7, 2026 |
| Linux | perl-Cpanel-JSON-XS-debugsource Fedora 43 | 4.80-1.fc43 | [FEDORA-2026-4447E52D23](https://patchblox.com/security/data/fix/linux/fedora-2026-4447e52d23.md) | Nov 7, 2026 |
| Linux | perl-Cpanel-JSON-XS-debugsource amzn 2023 | 4.25-2.amzn2023.0.10 | [ALAS2023-2026-3352](https://patchblox.com/security/data/fix/linux/alas2023-2026-3352.md) | Nov 7, 2026 |

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Data as of 2026-11-09T01:18:40Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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