{"id":"CVE-2026-114654","aliases":[],"cve":{"records":[{"id":"CVE-2026-114654","source":"mongodb","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-10-21T21:57:56.257Z","published":"2026-10-22T19:13:59.597Z","modified":"2026-10-30T19:27:57.892Z"}],"publishers":[{"name":"mongodb","role":"CNA","organizationId":"a39b4221-9bd0-4244-95fc-f3e2e07f1deb","modified":"2026-10-22T21:25:37.785Z"},{"name":"CISA-ADP","role":"ADP","organizationId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","modified":"2026-10-30T19:27:57.892Z"}],"references":[{"url":"https://jira.mongodb.org/browse/CSHARP-6166","tags":[],"source":"mongodb"},{"url":"https://github.com/mongodb/mongo-csharp-driver/releases/tag/v3.13.0","tags":[],"source":"mongodb"},{"url":"https://github.com/mongodb/mongo-csharp-driver/security/advisories/GHSA-5h2q-6c9r-7x25","tags":[],"source":"mongodb"},{"url":"https://github.com/mongodb/mongo-csharp-driver/security/advisories/GHSA-5h2q-6c9r-7x25","tags":["exploit"],"source":"CISA-ADP"}],"weaknesses":[{"id":"CWE-681","description":"CWE-681: Incorrect Conversion between Numeric Types","source":"mongodb"}],"applicability":[],"prioritization":[{"source":"CISA-ADP","type":"SSVC","role":"CISA Coordinator","timestamp":"2026-10-30T19:27:44.159977Z","decisions":[{"name":"Exploitation","value":"poc"},{"name":"Automatable","value":"yes"},{"name":"Technical Impact","value":"partial"}]}]},"title":"BSON output corruption via out-of-range binary subtype bypassing UUID and OldBinary guards","titleSource":"mongodb","descriptionSource":"mongodb","description":"A numeric-type conversion flaw in the BSON handling library of the MongoDB C# Driver allows an out-of-range binary subtype value supplied through untrusted textual input to bypass the library's binary-element integrity checks. When such a value is later encoded, it is narrowed to a smaller wire representation, producing binary elements that misdeclare their type or length. An unauthenticated party able to supply text parsed by an affected application can cause it to emit and persist malformed binary data, which subsequent readers either reject with an error or silently interpret as shorter than the data that was validated.","score":6.9,"severity":"medium","published":"2026-10-22T19:13:59.597Z","modified":"2026-10-30T19:27:57.892Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"MongoDB","name":"C# Driver","platforms":[],"versions":[{"version":"2.0.0","status":"affected","lessThan":"3.13.0","versionType":"semver"}],"defaultStatus":"unaffected","cpes":[],"source":"mongodb","url":"https://www.cve.org/CVERecord?id=CVE-2026-114654"}],"remediation":[],"references":["https://jira.mongodb.org/browse/CSHARP-6166","https://github.com/mongodb/mongo-csharp-driver/releases/tag/v3.13.0","https://github.com/mongodb/mongo-csharp-driver/security/advisories/GHSA-5h2q-6c9r-7x25"],"sources":[{"name":"CVE","id":"CVE-2026-114654","modified":"2026-10-30T19:27:57.892Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-114654"}],"assessments":[{"source":"mongodb","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N","score":6.9},{"source":"mongodb","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L","score":6.5}],"sourceAffected":[],"observedAt":"2026-10-30T19:39:36.555Z","kev":{"status":"not-listed","checkedAt":"2026-10-31T16:30:35.111Z"},"coverage":[{"source":"NVD","status":"available","checkedAt":"2026-10-30T19:40:33.938Z","attemptedAt":"2026-10-30T19:40:33.938Z"},{"source":"GHSA","status":"no-result","checkedAt":"2026-10-30T19:40:33.938Z","attemptedAt":"2026-10-30T19:40:33.938Z"},{"source":"EUVD","status":"available","checkedAt":"2026-10-30T19:40:33.938Z","attemptedAt":"2026-10-30T19:40:33.938Z"},{"source":"EPSS","status":"available","checkedAt":"2026-10-30T19:40:33.938Z","attemptedAt":"2026-10-30T19:40:33.938Z"}],"evidence":[{"source":"FIRST EPSS","id":"CVE-2026-114654","url":"https://www.first.org/epss/","probability":0.00349,"percentile":0.28508,"date":"2026-10-30","checkedAt":"2026-10-30T19:40:33.938Z"},{"source":"ENISA EUVD","id":"EUVD-2026-108328","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-108328","modified":"Oct 22, 2026, 9:25:37 PM","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N","checkedAt":"2026-10-30T19:40:33.938Z"},{"source":"NVD","id":"CVE-2026-114654","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-114654","modified":"2026-10-23T19:45:03.547","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/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/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","checkedAt":"2026-10-30T19:40:33.938Z"},{"source":"NVD","id":"CVE-2026-114654","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-114654","modified":"2026-10-23T19:45:03.547","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L","checkedAt":"2026-10-30T19:40:33.938Z"}],"aiSummary":{"text":"The MongoDB C# Driver, version 2.0.0, has a numeric-type conversion flaw allowing out-of-range binary subtype values to bypass integrity checks. An unauthenticated party can supply malicious text, causing the application to emit and persist malformed binary data. This data may be rejected or misinterpreted by subsequent readers.","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-10-31T05:26:04.904Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-114654"}]}}