{"id":"CVE-2026-9100","summary":"Heap memory out of bounds read and crash in C Driver legacy GridFS file reader","details":"The MongoDB C Driver's legacy GridFS API accepts malformed file metadata from the database without adequate validation. Crafted documents in a GridFS collection may cause any application that reads those files via the legacy API to either crash (via a division-by-zero) or silently leak process memory contents (via an out-of-bounds read).","modified":"2026-09-26T03:48:33.535996354Z","published":"2026-05-20T15:55:13.154Z","database_specific":{"cwe_ids":["CWE-1285"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/9xxx/CVE-2026-9100.json","unresolved_ranges":[{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"1.0"},{"fixed":"1.30.8"},{"introduced":"2.0"},{"fixed":"2.2.4"}]}],"cna_assigner":"mongodb"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/9xxx/CVE-2026-9100.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-9100"},{"type":"REPORT","url":"https://jira.mongodb.org/browse/CDRIVER-6281"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/mongodb/mongo-c-driver","events":[{"introduced":"1cb8a16e863cea77a61530b832ed2c7c1dc5c065"},{"fixed":"57dba9c04991e38124022e0f16c50b87bd9b29a1"},{"introduced":"67817df0a9ed11b07e457477e6db1384da9421c4"},{"fixed":"104e2f8337168126848db06b7e15f4c142a7426e"}],"database_specific":{"cpe":"cpe:2.3:a:mongodb:c_driver:*:*:*:*:*:mongodb:*:*","extracted_events":[{"introduced":"1.10.0"},{"fixed":"1.30.8"},{"introduced":"2.0.0"},{"fixed":"2.2.4"}],"source":"CPE_RANGE"}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-9100.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N"}]}