{"id":"CVE-2026-9516","state":"PUBLISHED","title":"Cpanel::JSON::XS versions before 4.41 for Perl allow denial of service via UTF-8 BOM prefixed input when a decode filter callback throws","description":"Cpanel::JSON::XS versions before 4.41 for Perl allow denial of service via UTF-8 BOM prefixed input when a decode filter callback throws.\n\nTo skip a leading 3-byte UTF-8 BOM, decode_json() advances the input scalar's string pointer past the mark with SvPV_set() and restores it only on the normal return path. When decoding aborts through a Perl exception, for example a filter_json_object callback that croaks, the restore is skipped and the scalar is left with its string pointer offset into its own buffer and a shortened length.\n\nWhen that scalar is later freed, the allocator receives an invalid pointer and the interpreter aborts. A single BOM prefixed document decoded with a throwing filter callback crashes any caller.","publishedAt":"2026-06-03T00:15:51.685Z","updatedAt":"2026-06-03T15:58:49.426Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"CISA-ADP"},"assigner":"CPANSec","products":["RURBAN Cpanel::JSON::XS"],"affected":[{"vendor":"RURBAN","product":"Cpanel::JSON::XS","packageName":"Cpanel-JSON-XS","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"4.41","versionType":"custom"}],"collectionURL":"https://cpan.org/modules","programFiles":["XS.xs"],"programRoutines":[{"name":"decode_json"}],"repo":"https://github.com/rurban/Cpanel-JSON-XS"}],"references":["https://github.com/rurban/Cpanel-JSON-XS/commit/dfe1b41a36caba51dc12a2917fe50285d1ffaa7b.patch","https://metacpan.org/release/RURBAN/Cpanel-JSON-XS-4.41/changes","http://www.openwall.com/lists/oss-security/2026/06/03/5"],"weaknesses":["CWE-763","CWE-755"],"ingestedAt":"2026-10-29T20:13:52.441Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/9xxx/CVE-2026-9516.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-9516","state":"PUBLISHED","datePublished":"2026-06-03T00:15:51.685Z","dateUpdated":"2026-06-03T15:58:49.426Z","assignerShortName":"CPANSec","assignerOrgId":"9b29abf9-4ab0-4765-b253-1875cd9b441e","dateReserved":"2026-05-25T18:54:26.396Z"},"containers":{"cna":{"title":"Cpanel::JSON::XS versions before 4.41 for Perl allow denial of service via UTF-8 BOM prefixed input when a decode filter callback throws","descriptions":[{"lang":"en","value":"Cpanel::JSON::XS versions before 4.41 for Perl allow denial of service via UTF-8 BOM prefixed input when a decode filter callback throws.\n\nTo skip a leading 3-byte UTF-8 BOM, decode_json() advances the input scalar's string pointer past the mark with SvPV_set() and restores it only on the normal return path. When decoding aborts through a Perl exception, for example a filter_json_object callback that croaks, the restore is skipped and the scalar is left with its string pointer offset into its own buffer and a shortened length.\n\nWhen that scalar is later freed, the allocator receives an invalid pointer and the interpreter aborts. A single BOM prefixed document decoded with a throwing filter callback crashes any caller."}],"affected":[{"vendor":"RURBAN","product":"Cpanel::JSON::XS","packageName":"Cpanel-JSON-XS","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"4.41","versionType":"custom"}],"collectionURL":"https://cpan.org/modules","programFiles":["XS.xs"],"programRoutines":[{"name":"decode_json"}],"repo":"https://github.com/rurban/Cpanel-JSON-XS"}],"references":[{"url":"https://github.com/rurban/Cpanel-JSON-XS/commit/dfe1b41a36caba51dc12a2917fe50285d1ffaa7b.patch","tags":["patch"]},{"url":"https://metacpan.org/release/RURBAN/Cpanel-JSON-XS-4.41/changes","tags":["release-notes"]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-763","description":"CWE-763 Release of Invalid Pointer or Reference","lang":"en","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-755","description":"CWE-755 Improper Handling of Exceptional Conditions","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"CPANSec","orgId":"9b29abf9-4ab0-4765-b253-1875cd9b441e","dateUpdated":"2026-06-03T00:15:51.685Z"},"solutions":[{"lang":"en","value":"Upgrade to Cpanel::JSON::XS 4.41 or later."}],"source":{"discovery":"UNKNOWN"},"timeline":[{"lang":"en","time":"2026-05-18T00:00:00.000Z","value":"Issue reported."},{"lang":"en","time":"2026-05-27T00:00:00.000Z","value":"Version 4.41 released with fix."},{"lang":"en","time":"2026-05-28T00:00:00.000Z","value":"Fix verified."}],"x_generator":{"engine":"cpansec-cna-tool 0.1"}},"adp":[{"title":"CVE Program Container","references":[{"url":"http://www.openwall.com/lists/oss-security/2026/06/03/5"}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2026-06-03T09:35:39.521Z"}},{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":7.5,"attackVector":"NETWORK","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"NONE","confidentialityImpact":"NONE"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-06-03T15:58:42.977647Z","id":"CVE-2026-9516","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-06-03T15:58:49.426Z"}}]}}}