CVE-2026-8200: medium-severity vulnerability in MongoDB Server
Schema validation log messages may not redact user data
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 4.8epss 0.2%
When schema validation is enabled on a collection and an update or insert would violate the collection's schema, the local server log message generated may not have all user data redacted.
This issue impacts MongoDB Server v7.0 versions prior to 7.0.34, v8.0 versions prior to 8.0.23, v8.2 versions prior to 8.2.9 and v8.3 versions prior to 8.3.2.
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N
Affected products
MongoDB, Inc. · MongoDB ServerRelated CVEs — MongoDB Server
In the same product, most dangerous first.
CVE-2026-8053HIGHFlatBSON Duplicate Field Index DriftEPSS 0.7%CVE-2026-8202MEDIUMPost-authentication CPU utilization DoS via $trim/$ltrim/$rtrim operatorsEPSS 0.3%CVE-2026-8199HIGHPost-auth memory exhaustion via bitwise match expressionsEPSS 0.3%CVE-2026-8336HIGHPost-authentication use-after-free error in $_internalJsEmit and mapreduce commandsEPSS 0.3%CVE-2026-8843HIGHCalling createIndex with certain index types can crash mongodEPSS 0.2%CVE-2026-8201MEDIUMUse-After-Free in MongoDB FLE Query Analysis When Processing Positional Projections on Encrypted FieldsEPSS 0.1%