{"id":"CVE-2026-18888","summary":"MongoDB BI Connector ODBC driver may write outside an allocated buffer when retrieving large floating point values as character data","details":"The MongoDB BI Connector ODBC Driver converts floating point column values into text without checking that the result fits within the destination buffer. When an application reads a sufficiently large floating point value as text, the driver may write beyond the end of that buffer and corrupt adjacent memory. A user who can store data in a collection read through the BI Connector could use this to crash the application performing the read.","modified":"2026-09-13T03:45:48.838750684Z","published":"2026-08-12T20:29:33.618Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/18xxx/CVE-2026-18888.json","cna_assigner":"mongodb","cwe_ids":["CWE-787"]},"references":[{"type":"WEB","url":"https://github.com/mongodb/mongo-bi-connector-odbc-driver/releases/tag/v1.4.9"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/18xxx/CVE-2026-18888.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-18888"},{"type":"PACKAGE","url":"https://github.com/mongodb/mongo-bi-connector-odbc-driver"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/mongodb/mongo-bi-connector-odbc-driver","events":[{"introduced":"f68c45f988f49a9db4b8cc6be90f3e33de1ddd8f"},{"fixed":"6c875f477f3c6b8f6b5620b80fd74f36678f3651"}],"database_specific":{"extracted_events":[{"introduced":"1.0.0"},{"fixed":"1.4.9"}],"source":["AFFECTED_FIELD","CPE_RANGE","REFERENCES"],"cpe":"cpe:2.3:a:mongodb:bi_connector_odbc_driver:*:*:*:*:*:*:*:*"}}],"versions":["v1.4.8","v1.4.7","v1.4.6","v1.4.6-beta","v1.4.5","v1.4.4","v1.4.3","v1.4.2","v1.4.1","v1.4.0","v1.3.0","v1.2.0","v1.1.0","v1.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-18888.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"}]}