{"affected":[{"defaultStatus":"unaffected","product":"Rust Driver","source":"CNA: mongodb","vendor":"MongoDB","versions":[{"lessThan":"3.9.1","status":"affected","version":"3.9.0","versionType":"semver"},{"lessThan":"3.8.2","status":"affected","version":"3.8.0","versionType":"semver"},{"status":"affected","version":"3.7.0","versionType":"semver"},{"status":"affected","version":"3.6.0","versionType":"semver"},{"lessThan":"3.5.2","status":"affected","version":"3.5.0","versionType":"semver"},{"lessThan":"3.4.1","status":"affected","version":"3.4.0","versionType":"semver"},{"status":"affected","version":"3.3.0","versionType":"semver"},{"lessThan":"3.2.5","status":"affected","version":"3.2.0","versionType":"semver"},{"lessThan":"3.1.1","status":"affected","version":"3.1.0","versionType":"semver"},{"lessThan":"3.0.1","status":"affected","version":"3.0.0","versionType":"semver"},{"lessThan":"2.8.2","status":"affected","version":"2.8.0","versionType":"semver"},{"lessThan":"2.7.1","status":"affected","version":"2.7.0","versionType":"semver"},{"lessThan":"2.6.1","status":"affected","version":"2.6.0","versionType":"semver"},{"status":"affected","version":"2.5.0","versionType":"semver"},{"status":"affected","version":"2.4.0","versionType":"semver"}]}],"cveId":"CVE-2026-126838","cwes":["CWE-532"],"description":"A MongoDB Rust Driver component that holds client-side field level encryption settings includes key management service credential material in its diagnostic formatting output without redaction. An application that records or displays this formatted output may place that material where a party with read access to the application's diagnostic output can see it, which may result in unintended disclosure of key material.","epss":null,"exploits":[],"kev":null,"metrics":[{"score":5.7,"severity":"medium","source":"CNA: mongodb","vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","version":"4.0"},{"score":5.5,"severity":"medium","source":"CNA: mongodb","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","version":"3.1"}],"modifiedAt":1794509200666,"publishedAt":1794509200666,"references":[{"source":"CNA: mongodb","tags":[],"url":"https://jira.mongodb.org/browse/RUST-2531"}],"remediation":[],"revision":"b7d0b07fffd0dc6a1c508c8072c41afc26b45d61598509a15d838ff1685edba7","sources":[{"modifiedAt":1794509200666,"name":"CNA: mongodb","retrievedAt":1794510600914,"url":"https://www.cve.org/CVERecord?id=CVE-2026-126838"}],"ssvc":null,"status":"published","title":"Rust Driver public Client Debug output exposes CSFLE KMS master-key material","updatedAt":1794510600914}