{"id":"CVE-2026-110688","title":"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","summary":"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.\n\nAt the first non-ASCII byte in a string, the decoder validates UTF-8 from there to the end of…","severity":"none","cwe":["CWE-407"],"product":"Cpanel-JSON-XS","affected":["Cpanel-JSON-XS >= 4.51 < 4.80"],"published":"2026-10-19","updated":"2026-10-19","sourceUpdated":"2026-10-19T18:12:25.276Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-110688","references":[{"url":"https://github.com/rurban/Cpanel-JSON-XS/commit/384309f6a297384e69c851b5d64e1c421d9b2dcc.patch"},{"url":"https://metacpan.org/release/RURBAN/Cpanel-JSON-XS-4.80/changes"}],"tags":["cve.org"],"ingestedAt":"2026-10-19T18:35:50.141Z","slug":"CVE-2026-110688","body":"## Overview\n\nCpanel::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.\n\nAt 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.\n\nA peer that sends about a megabyte of ordinary non-ASCII JSON in one read ties up the process for seconds of CPU time.\n\n## Affected\n\n- `Cpanel-JSON-XS >= 4.51 < 4.80`\n\n## Remediation\n\nUpgrade to Cpanel-JSON-XS 4.80 or later.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}