{"id":"CVE-2026-9100","title":"The MongoDB C Driver's legacy GridFS API accepts malformed file metadata from the database without adequate validation","summary":"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 eithe…","severity":"medium","cvss":5.9,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:H","cwe":["CWE-1285"],"vendor":"mongodb","product":"c_driver","affected":["c_driver >= 1.10.0, < 1.30.8","c_driver >= 2.0.0, < 2.2.4"],"patched":["c_driver 2.2.4"],"published":"2026-05-20","updated":"2026-09-24","sourceUpdated":"2026-09-24T17:30:59.373","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-9100","references":[{"url":"https://jira.mongodb.org/browse/CDRIVER-6281","label":"cna@mongodb.com"}],"tags":["nvd"],"epss":0.00301,"epssPercentile":0.22692,"ingestedAt":"2026-07-23T12:17:55.502Z","slug":"CVE-2026-9100","body":"## Overview\n\nThe 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).\n\n## Affected\n\n- `c_driver >= 1.10.0, < 1.30.8`\n- `c_driver >= 2.0.0, < 2.2.4`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `c_driver 2.2.4`","depth":"sunlit","depthScore":33,"depthScoreParts":{"impact":32.5,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}