{"id":"CVE-2026-114649","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-114649","generatedAt":"2026-10-28T05:27:45.654Z","title":"The MongoDB C# Driver compares TLS client certificates by issuer and serial number only when deciding whether two clients can share cached connections.","description":"The MongoDB C# Driver compares TLS client certificates by issuer and serial number only when deciding whether two clients can share cached connections. In an application that creates clients from certificates supplied by different users, a user who provides a certificate copying another user's issuer and serial number, without that user's private key, can be given connections authenticated with the other user's certificate. Database operations can then run under the other user's identity, affecting the confidentiality and integrity of data that identity can access.","published":"2026-10-22T19:17:39.000Z","lastModified":"2026-10-23T19:45:04.000Z","status":"Awaiting Analysis","sourceIdentifier":"cna@mongodb.com","cvss":{"version":"4.0","score":7.6,"severity":"HIGH","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-1025"],"affected":[],"epss":{"score":0.002,"percentile":0.09696,"date":"2026-10-27","history":[{"date":"2026-10-23","score":0.002,"percentile":0.09275}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.20%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-22T19:17:39.000Z","detail":{"score":"7.6","severity":"HIGH","publishedAt":"2026-10-22T19:17:38.703Z"},"summary":"New CVE, high severity (CVSS 7.6)."}],"references":[{"url":"https://github.com/mongodb/mongo-csharp-driver/releases/tag/v3.13.0","source":"cna@mongodb.com"},{"url":"https://github.com/mongodb/mongo-csharp-driver/security/advisories/GHSA-6gjm-424r-3jh2","source":"cna@mongodb.com"},{"url":"https://jira.mongodb.org/browse/CSHARP-6184","source":"cna@mongodb.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-114649","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}