{"id":"CVE-2026-110687","title":"Cpanel::JSON::XS versions from 4.43 before 4.80 for Perl misorder byte-string keys during canonical encoding in utf16_cmp","summary":"Cpanel::JSON::XS versions from 4.43 before 4.80 for Perl misorder byte-string keys during canonical encoding in utf16_cmp.\n\ncanonical sorts keys by UTF-16 code units. When any key in a hash is UTF-8 flagged, every key is decoded as UTF-8…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","cvssSource":"adp","cwe":["CWE-176"],"product":"Cpanel-JSON-XS","affected":["Cpanel-JSON-XS >= 4.43 < 4.80"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-10-29T17:15:03.635936Z"},"published":"2026-10-19","updated":"2026-10-29","sourceUpdated":"2026-10-29T17:15:37.701Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-110687","references":[{"url":"https://github.com/rurban/Cpanel-JSON-XS/commit/bb9da30b67f637f4d57922f0e043376363f28f0c.patch"},{"url":"https://metacpan.org/release/RURBAN/Cpanel-JSON-XS-4.80/changes"}],"tags":["cve.org"],"epss":0.00422,"epssPercentile":0.36523,"ingestedAt":"2026-10-19T18:35:50.142Z","slug":"CVE-2026-110687","body":"## Overview\n\nCpanel::JSON::XS versions from 4.43 before 4.80 for Perl misorder byte-string keys during canonical encoding in utf16_cmp.\n\ncanonical sorts keys by UTF-16 code units. When any key in a hash is UTF-8 flagged, every key is decoded as UTF-8 for the comparison, including byte-string keys that the encoder writes out as Latin-1 characters. A byte-string key whose bytes are valid UTF-8 is sorted out of order, and two keys that encode differently can compare equal and are left in hash order.\n\nThe same data can encode to different canonical documents across processes.\n\n## Affected\n\n- `Cpanel-JSON-XS >= 4.43 < 4.80`\n\n## Remediation\n\nUpgrade to Cpanel-JSON-XS 4.80 or later.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":231914,"id":"CVE-2026-110687","ts":1793566933801,"field":"cvss","old":null,"new":"7.5"},{"seq":231913,"id":"CVE-2026-110687","ts":1793566933801,"field":"severity","old":"none","new":"high"}]}