CPANSA-JSON-SIMD-2026-110686: JSON-SIMD vulnerability

Publisher giterlizzi Document category csaf_security_advisory
Initial release date 2026-10-19T00:00:00 Engine CSAF Perl Toolkit 0.26
Current release date 2026-10-19T00:00:00 Build Date
Current version 1 Status final
CVSS v3.1 Base Score 6.5 Severity
Original language Language en
Also referred to

Vulnerability Description

Cpanel::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.

Vulnerabilities

CVE-2026-110686

Vulnerability Description

Cpanel::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.

Weakness CWE-416 : Use After Free

Product status

Known affected
Product Score
JSON-SIMD less than 1.08
CVSS Version CVSS Vector CVSS Base Score CVSS Base Severity
3.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H 6.5 Medium
Fixed

giterlizzi

Namespace: https://github.com/giterlizzi/

gdt@cpan.org

References

Revision history

Version Date of the revision Summary of the revision
1 Mon Oct 19 00:00:00 2026 First release

Sharing rules

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