CVE-2026-110673

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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/rurban/Cpanel-JSON-XS/commit/995eb484a9351753e2a8ec3317918b5b4a4e086a.patch
https://metacpan.org/release/RURBAN/Cpanel-JSON-XS-4.80/changes

Configurations

No configuration.

History

29 Oct 2026, 17:17

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.5

19 Oct 2026, 19:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-19 19:17

Updated : 2026-10-29 17:17

NVD link : CVE-2026-110673

Mitre link : CVE-2026-110673

CVE.ORG link : CVE-2026-110673

JSON object : View

Products Affected

No product.

CWE

CWE-674

Uncontrolled Recursion

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