Cpanel::JSON::XS versions before 4.80 for Perl use freed filter callbacks when a filter removes itself during decoding in decode_hv

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-110686
StatePUBLISHED
AssignerCPANSec
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-19 19:17:22 UTC
Updated2026-10-19 20:50:17 UTC
DescriptionCpanel::JSON::XS versions before 4.80 for Perl use freed filter callbacks when a filter removes itself during decoding in decode_hv. A decode copies the parser's filter_json_object and filter_json_single_key_object callbacks without taking references to them. A filter callback that removes the last single-key filter frees the callback table while the decode in progress still uses it. The next object is dispatched through freed memory and can crash the process.

Risk And Classification

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

References

ReferenceSourceLinkTags
metacpan.org/release/RURBAN/Cpanel-JSON-XS-4.80/changes 9b29abf9-4ab0-4765-b253-1875cd9b441e metacpan.org
github.com/rurban/Cpanel-JSON-XS/commit/c3e7e3c5b0b72d82b072c6a7cfb8c34c... 9b29abf9-4ab0-4765-b253-1875cd9b441e github.com
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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