{"id":"CVE-2026-110677","title":"Cpanel::JSON::XS versions from 4.28 before 4.80 for Perl leak the array collecting duplicate key values under dupkeys_as_arrayref in decode_hv","summary":"Cpanel::JSON::XS versions from 4.28 before 4.80 for Perl leak the array collecting duplicate key values under dupkeys_as_arrayref in decode_hv.\n\nWith dupkeys_as_arrayref, the values of a duplicate object key are collected into a new arra…","severity":"none","cwe":["CWE-401"],"product":"Cpanel-JSON-XS","affected":["Cpanel-JSON-XS >= 4.28 < 4.80"],"published":"2026-10-19","updated":"2026-10-19","sourceUpdated":"2026-10-19T18:11:53.004Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-110677","references":[{"url":"https://github.com/rurban/Cpanel-JSON-XS/commit/edb13030a708afc2cde0d2629fb6bdd31288ce6c.patch"},{"url":"https://metacpan.org/release/RURBAN/Cpanel-JSON-XS-4.80/changes"}],"tags":["cve.org"],"ingestedAt":"2026-10-19T18:35:50.145Z","slug":"CVE-2026-110677","body":"## Overview\n\nCpanel::JSON::XS versions from 4.28 before 4.80 for Perl leak the array collecting duplicate key values under dupkeys_as_arrayref in decode_hv.\n\nWith dupkeys_as_arrayref, the values of a duplicate object key are collected into a new array. An extra reference is never released, so the array and every value in it outlive the decoded structure. The array also leaks when decoding fails after a duplicate key.\n\nRepeatedly decoding untrusted JSON with a duplicate key holding a large value exhausts process memory.\n\n## Affected\n\n- `Cpanel-JSON-XS >= 4.28 < 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":[]}