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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-110681
StatePUBLISHED
AssignerCPANSec
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-19 19:17:21 UTC
Updated2026-10-19 20:50:17 UTC
DescriptionCpanel::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.

Risk And Classification

Problem Types: CWE-416 | CWE-416 CWE-416 Use After Free

References

ReferenceSourceLinkTags
github.com/rurban/Cpanel-JSON-XS/commit/c53eefbaa59c344abd4c71762118da04... 9b29abf9-4ab0-4765-b253-1875cd9b441e github.com
metacpan.org/release/RURBAN/Cpanel-JSON-XS-4.80/changes 9b29abf9-4ab0-4765-b253-1875cd9b441e metacpan.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Additional Advisory Data

SourceTimeEvent
CNA2026-10-14T00:00:00.000ZVersion 4.80 released with fix.

Solutions

CNA: Upgrade to Cpanel-JSON-XS 4.80 or later.

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