{"id":"CVE-2026-82057","summary":"Type Confusion in MongoDB Server WiredTiger Storage Engine via Custom Collection Configuration Leads to Persistent Denial of Service","details":"A security issue was discovered in MongoDB where an authenticated user with readWrite privileges could crash the mongod server process. By specifying a custom WiredTiger storage configuration option with an incompatible value during collection creation, a user could cause a type confusion in the storage engine layer. When documents were subsequently read from the misconfigured collection, the resulting mismatch in expected data format led to corrupted memory interpretation and a server crash. The crafted collection configuration persists across restarts, requiring manual operator intervention to remediate.","aliases":["BIT-mongodb-2026-82057"],"modified":"2026-09-18T03:48:30.504133482Z","published":"2026-09-08T16:12:19.182Z","database_specific":{"unresolved_ranges":[{"extracted_events":[{"introduced":"8.3.0"},{"fixed":"8.3.9"}],"source":"AFFECTED_FIELD"}],"cna_assigner":"mongodb","cwe_ids":["CWE-843"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82057.json"},"references":[{"type":"WEB","url":"https://jira.mongodb.org/browse/SERVER-130495"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82057.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-82057"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/mongodb/mongo","events":[{"introduced":"0f29b043a58fdd251ce0a0b32754b8459613c933"},{"fixed":"1dc3d60c3237b53589325474c668e849ecec3bae"}],"database_specific":{"cpe":"cpe:2.3:a:mongodb:mongodb:*:*:*:*:-:*:*:*","extracted_events":[{"introduced":"8.3.0"},{"fixed":"8.3.9"}],"source":"CPE_RANGE"}}],"versions":["r8.3.3","r8.3.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-82057.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"}]}