{"id":"CVE-2026-110674","title":"Cpanel::JSON::XS versions from 4.33 before 4.80 for Perl miss duplicate non-ASCII bare keys, allowing type confusion under dupkeys_as_arrayref in decode_hv","summary":"Cpanel::JSON::XS versions from 4.33 before 4.80 for Perl miss duplicate non-ASCII bare keys, allowing type confusion under dupkeys_as_arrayref in decode_hv.\n\nWith allow_barekey, which relaxed enables, a bare key containing a non-ASCII by…","severity":"none","cwe":["CWE-843","CWE-176"],"product":"Cpanel-JSON-XS","affected":["Cpanel-JSON-XS >= 4.33 < 4.80"],"published":"2026-10-19","updated":"2026-10-19","sourceUpdated":"2026-10-19T18:11:25.890Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-110674","references":[{"url":"https://github.com/rurban/Cpanel-JSON-XS/commit/c52037857d6a99d96ebd1ce3e2fa769505f028cf.patch"},{"url":"https://metacpan.org/release/RURBAN/Cpanel-JSON-XS-4.80/changes"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-9334"}],"tags":["cve.org"],"ingestedAt":"2026-10-19T18:35:50.146Z","slug":"CVE-2026-110674","body":"## Overview\n\nCpanel::JSON::XS versions from 4.33 before 4.80 for Perl miss duplicate non-ASCII bare keys, allowing type confusion under dupkeys_as_arrayref in decode_hv.\n\nWith allow_barekey, which relaxed enables, a bare key containing a non-ASCII byte is stored as UTF-8 but looked up as raw bytes, so a repeated key escapes the duplicate-key check and replaces the earlier value.\n\nFrom 4.41, under dupkeys_as_arrayref, a bare repeat replaces the array that collects a key's values with a plain value, and the next quoted repeat pushes onto that value as if it were an array. A JSON integer there is dereferenced as a pointer.\n\nUntrusted JSON decoded with relaxed and dupkeys_as_arrayref can crash the process or dereference an address chosen by a JSON number.\n\n## Affected\n\n- `Cpanel-JSON-XS >= 4.33 < 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":[]}