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CVE-2026-110673 Details

Description

Cpanel::JSON::XS versions before 4.80 for Perl allow stack exhaustion via nested tagged values under allow_tags in decode_tag. With allow_tags, "(" starts a tagged value. Its tag and value are decoded recursively, and each can start another tagged value. Unlike arrays and objects, this nesting is not counted against max_depth. A run of "(" bytes exhausts the C stack and triggers an uncatchable segmentation fault regardless of max_depth.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: CISA-ADPCVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/rurban/Cpanel-JSON-XS/commit/995eb484a9351753e2a8ec3317918b5b4a4e086a.patch	CPANSec
https://metacpan.org/release/RURBAN/Cpanel-JSON-XS-4.80/changes	CPANSec

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-674	Uncontrolled Recursion	CPANSec

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

Date	Action	Recorded By
Oct 29, 2026	CVE Modified	CISA-ADP
Oct 19, 2026	New CVE Received	CPANSec