CVE-2026-124539

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-124539", "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "state": "PUBLISHED", "assignerShortName": "CPANSec", "dateReserved": "2026-11-08T12:32:19.890Z", "datePublished": "2026-11-14T11:52:36.293Z", "dateUpdated": "2026-11-14T11:52:36.293Z"}, "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": {"orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "shortName": "CPANSec", "dateUpdated": "2026-11-14T11:52:36.293Z"}, "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"}}}}

{}

{"affected": [{"affectedData": [{"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"}]}], "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"}], "cveTags": [], "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."}], "id": "CVE-2026-124539", "lastModified": "2026-11-14T12:17:43.560", "metrics": {}, "published": "2026-11-14T12:17:43.560", "references": [{"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "url": "https://metacpan.org/release/MLEHMANN/JSON-XS-4.05/changes"}], "sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-401"}], "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "type": "Secondary"}]}

{}

{}