CVE-2026-110688 - 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
Brief
CVE ID : CVE-2026-110688
Published : Oct. 19, 2026, 7:17 p. m.
- 38 minutes ago
Description : 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.
Severity: 0.0
- NA