{"api_version":"1","generated_at":"2026-11-14T23:50:35+00:00","cve":"CVE-2026-124539","urls":{"html":"https://cve.report/CVE-2026-124539","api":"https://cve.report/api/cve/CVE-2026-124539.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-124539","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-124539"},"summary":{"title":"JSON::XS versions before 4.05 for Perl leak the decoded key of an object rejected for a missing colon in decode_hv","description":"JSON::XS versions before 4.05 for Perl leak the decoded key of an object rejected for a missing colon in decode_hv.\n\nUnless it is short plain ASCII, a quoted key is decoded into a new scalar. Nothing frees that scalar when the object is rejected for a missing ':' after the key.\n\nA process that keeps running after a failed decode retains one key per rejected document, with its size chosen by the sender. Repeated requests exhaust process memory.","state":"PUBLISHED","assigner":"CPANSec","published_at":"2026-11-14 12:17:43","updated_at":"2026-11-14 12:17:43"},"problem_types":["CWE-401","CWE-401 CWE-401 Missing Release of Memory after Effective Lifetime"],"metrics":[],"references":[{"url":"https://metacpan.org/release/MLEHMANN/JSON-XS-4.05/changes","name":"https://metacpan.org/release/MLEHMANN/JSON-XS-4.05/changes","refsource":"9b29abf9-4ab0-4765-b253-1875cd9b441e","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-124539","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-124539","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[{"source":"CNA","time":"2026-11-13T00:00:00.000Z","lang":"en","value":"Version 4.05 released with fix."}],"solutions":[{"source":"CNA","title":"","value":"Upgrade to JSON-XS 4.05 or later.","time":"","lang":"en"}],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"collectionURL":"https://cpan.org/modules","defaultStatus":"unaffected","modules":["JSON::XS"],"packageName":"JSON-XS","packageURL":"pkg:cpan/JSON-XS","programFiles":["XS.xs"],"programRoutines":[{"name":"decode_hv"}],"repo":"https://cvs.schmorp.de/JSON-XS/","versions":[{"lessThan":"4.05","status":"affected","version":"0","versionType":"custom"}]}],"descriptions":[{"lang":"en","value":"JSON::XS versions before 4.05 for Perl leak the decoded key of an object rejected for a missing colon in decode_hv.\n\nUnless it is short plain ASCII, a quoted key is decoded into a new scalar. Nothing frees that scalar when the object is rejected for a missing ':' after the key.\n\nA process that keeps running after a failed decode retains one key per rejected document, with its size chosen by the sender. Repeated requests exhaust process memory."}],"problemTypes":[{"descriptions":[{"cweId":"CWE-401","description":"CWE-401 Missing Release of Memory after Effective Lifetime","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-11-14T11:52:36.293Z","orgId":"9b29abf9-4ab0-4765-b253-1875cd9b441e","shortName":"CPANSec"},"references":[{"tags":["release-notes"],"url":"https://metacpan.org/release/MLEHMANN/JSON-XS-4.05/changes"}],"solutions":[{"lang":"en","value":"Upgrade to JSON-XS 4.05 or later."}],"source":{"discovery":"UNKNOWN"},"timeline":[{"lang":"en","time":"2026-11-13T00:00:00.000Z","value":"Version 4.05 released with fix."}],"title":"JSON::XS versions before 4.05 for Perl leak the decoded key of an object rejected for a missing colon in decode_hv","x_generator":{"engine":"cpansec-cna-tool 0.1"}}},"cveMetadata":{"assignerOrgId":"9b29abf9-4ab0-4765-b253-1875cd9b441e","assignerShortName":"CPANSec","cveId":"CVE-2026-124539","datePublished":"2026-11-14T11:52:36.293Z","dateReserved":"2026-11-08T12:32:19.890Z","dateUpdated":"2026-11-14T11:52:36.293Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-11-14 12:17:43","lastModifiedDate":"2026-11-14 12:17:43","problem_types":["CWE-401","CWE-401 CWE-401 Missing Release of Memory after Effective Lifetime"],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"124539","Ordinal":"1","Title":"JSON::XS versions before 4.05 for Perl leak the decoded key of a","CVE":"CVE-2026-124539","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"124539","Ordinal":"1","NoteData":"JSON::XS versions before 4.05 for Perl leak the decoded key of an object rejected for a missing colon in decode_hv.\n\nUnless it is short plain ASCII, a quoted key is decoded into a new scalar. Nothing frees that scalar when the object is rejected for a missing ':' after the key.\n\nA process that keeps running after a failed decode retains one key per rejected document, with its size chosen by the sender. Repeated requests exhaust process memory.","Type":"Description","Title":"JSON::XS versions before 4.05 for Perl leak the decoded key of a"}]}}}