{"id":"CVE-2026-120954","published":"2026-11-03T19:18:00.470","lastModified":"2026-11-03T20:18:12.557","description":"A weakness in the BSON library's handling of a specialized binary vector data type allows an arithmetic wraparound when computing the number of elements described by an oversized attacker-supplied value. On builds where the platform word size is 32 bits, an application that parses untrusted BSON data can be made to process only a small fraction of the supplied elements while the operation reports success, producing results that disagree with byte-oriented accessors and with 64-bit builds of the same library. No authentication or user interaction is required beyond getting the application to parse the data. The impact is limited to data integrity; memory safety is not affected and no information is disclosed.","cvssScore":3.7,"cvssSeverity":"LOW","cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","cwes":["CWE-190"],"vendors":[],"products":[],"references":[{"url":"https://jira.mongodb.org/browse/CDRIVER-6420","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}