{"id":"CVE-2026-81523","title":"A missing input-validation issue in MongoDB libmongocrypt's automatic-encryption context setup allows a caller-supplied database identifier to be accepted without sanitization","summary":"A missing input-validation issue in MongoDB libmongocrypt's automatic-encryption context setup allows a caller-supplied database identifier to be accepted without sanitization. The resulting impact is limited to incorrect schema selectio…","severity":"medium","cvss":4.4,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","cwe":["CWE-74"],"vendor":"mongodb","product":"libmongocrypt","affected":["libmongocrypt < 1.20.3"],"patched":["libmongocrypt 1.20.3"],"published":"2026-08-27","updated":"2026-09-17","sourceUpdated":"2026-09-17T13:59:18.310","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-81523","references":[{"url":"https://github.com/mongodb/libmongocrypt/releases/tag/1.20.3","label":"cna@mongodb.com"},{"url":"https://jira.mongodb.org/browse/MONGOCRYPT-977","label":"cna@mongodb.com"}],"tags":["nvd"],"epss":0.00071,"epssPercentile":0.00061,"ingestedAt":"2026-09-17T14:19:30.938Z","slug":"CVE-2026-81523","body":"## Overview\n\nA missing input-validation issue in MongoDB libmongocrypt's automatic-encryption context setup allows a caller-supplied database identifier to be accepted without sanitization. The resulting impact is limited to incorrect schema selection, which may lead to limited disclosure or modification of information handled by the application.\n\n## Affected\n\n- `libmongocrypt < 1.20.3`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `libmongocrypt 1.20.3`","depth":"sunlit","depthScore":24,"depthScoreParts":{"impact":24.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}