Cloudanix VulnDB

CVE-2026-110688

High · 7.5

CVSS

7.5

EPSS

0.5%

Published

Oct 19, 2026

CISA due date

—

The record

Cpanel::JSON::XS versions from 4.51 before 4.80 for Perl allow quadratic CPU use by revalidating the remaining buffer per value in incr_parse. At the first non-ASCII byte in a string, the decoder validates UTF-8 from there to the end of its input. incr_parse decodes each buffered value with a fresh decoder, so every value revalidates the rest of the buffer, and doubling the input quadruples the work. A peer that sends about a megabyte of ordinary non-ASCII JSON in one read ties up the process for seconds of CPU time.

Affected packages

Ecosystem Package Introduced Fixed

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