{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-129114", "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "state": "PUBLISHED", "assignerShortName": "CPANSec", "dateReserved": "2026-11-13T15:54:30.291Z", "datePublished": "2026-11-14T11:53:52.483Z", "dateUpdated": "2026-11-14T11:53:52.483Z"}, "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": "JSON::XS::incr_parse"}], "repo": "https://cvs.schmorp.de/JSON-XS/", "versions": [{"lessThan": "4.05", "status": "affected", "version": "3.04", "versionType": "custom"}]}], "credits": [{"lang": "en", "type": "reporter", "value": "Albert Gierlach (rivit)"}], "descriptions": [{"lang": "en", "value": "JSON::XS versions from 3.04 before 4.05 for Perl write one byte past a heap buffer when appending a one-byte chunk in incr_parse.\n\nThe incremental buffer grows to one and a half times the length it must hold, with no room reserved for the terminating NUL. For an empty buffer and a one-byte chunk that request is one byte, which a buffer whose front was removed by earlier decodes can already have, so nothing is reallocated and the NUL lands one byte past the allocation.\n\nA peer streaming data to an incr_parse consumer, choosing how the input is split into reads, can cause a one-byte heap out-of-bounds write."}], "problemTypes": [{"descriptions": [{"cweId": "CWE-193", "description": "CWE-193 Off-by-one Error", "lang": "en", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-122", "description": "CWE-122 Heap-based Buffer Overflow", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "shortName": "CPANSec", "dateUpdated": "2026-11-14T11:53:52.483Z"}, "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 from 3.04 before 4.05 for Perl write one byte past a heap buffer when appending a one-byte chunk in incr_parse", "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": "JSON::XS::incr_parse"}], "repo": "https://cvs.schmorp.de/JSON-XS/", "versions": [{"lessThan": "4.05", "status": "affected", "version": "3.04", "versionType": "custom"}]}], "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "JSON::XS versions from 3.04 before 4.05 for Perl write one byte past a heap buffer when appending a one-byte chunk in incr_parse.\n\nThe incremental buffer grows to one and a half times the length it must hold, with no room reserved for the terminating NUL. For an empty buffer and a one-byte chunk that request is one byte, which a buffer whose front was removed by earlier decodes can already have, so nothing is reallocated and the NUL lands one byte past the allocation.\n\nA peer streaming data to an incr_parse consumer, choosing how the input is split into reads, can cause a one-byte heap out-of-bounds write."}], "id": "CVE-2026-129114", "lastModified": "2026-11-14T12:17:44.007", "metrics": {}, "published": "2026-11-14T12:17:44.007", "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-122"}, {"lang": "en", "value": "CWE-193"}], "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "type": "Secondary"}]}

{}

{"created": "2026-11-14T20:15:08.061078+00:00", "updated": "2026-11-14T20:15:08.061089+00:00", "vendors": []}