{"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":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cvssSource":"adp","cwe":["CWE-401"],"product":"Cpanel-JSON-XS","affected":["Cpanel-JSON-XS >= 4.28 < 4.80"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-10-29T16:43:11.877857Z"},"published":"2026-10-19","updated":"2026-10-29","sourceUpdated":"2026-10-29T16:43:21.148Z","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"],"epss":0.00485,"epssPercentile":0.4178,"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":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":231904,"id":"CVE-2026-110677","ts":1793566931045,"field":"cvss","old":null,"new":"7.5"},{"seq":231903,"id":"CVE-2026-110677","ts":1793566931045,"field":"severity","old":"none","new":"high"}]}