{"id":"CVE-2026-114651","aliases":[],"cve":{"records":[{"id":"CVE-2026-114651","source":"mongodb","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-10-21T21:57:51.270Z","published":"2026-10-22T19:13:56.276Z","modified":"2026-10-30T19:25:16.427Z"}],"publishers":[{"name":"mongodb","role":"CNA","organizationId":"a39b4221-9bd0-4244-95fc-f3e2e07f1deb","modified":"2026-10-22T20:38:23.091Z"},{"name":"CISA-ADP","role":"ADP","organizationId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","modified":"2026-10-30T19:25:16.427Z"}],"references":[{"url":"https://jira.mongodb.org/browse/CSHARP-6170","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-f8xm-c88f-wq46","tags":[],"source":"mongodb"},{"url":"https://github.com/mongodb/mongo-csharp-driver/security/advisories/GHSA-f8xm-c88f-wq46","tags":["exploit"],"source":"CISA-ADP"}],"weaknesses":[{"id":"CWE-908","description":"CWE-908: Use of Uninitialized Resource","source":"mongodb"}],"applicability":[],"prioritization":[{"source":"CISA-ADP","type":"SSVC","role":"CISA Coordinator","timestamp":"2026-10-30T19:24:56.106622Z","decisions":[{"name":"Exploitation","value":"poc"},{"name":"Automatable","value":"no"},{"name":"Technical Impact","value":"partial"}]}]},"title":"Cross-document data leak via malformed BSON array parsing in reused thread buffer","titleSource":"mongodb","descriptionSource":"mongodb","description":"A memory-handling weakness in the BSON deserialization component of the MongoDB C# Driver may cause data left over from previously processed content to be returned when specially crafted serialized input is parsed. An unauthenticated party able to supply serialized data to an application that maps certain primitive collection types can cause residual bytes from unrelated data processed earlier on the same execution thread to be surfaced as legitimate values. This can result in disclosure of a limited amount of information belonging to other requests or principals of the consuming application. No authentication or special privileges within the application are required.","score":6.3,"severity":"medium","published":"2026-10-22T19:13:56.276Z","modified":"2026-10-30T19:25:16.427Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"MongoDB","name":"C# Driver","platforms":[],"versions":[{"version":"2.26.0","status":"affected","lessThan":"3.13.0","versionType":"semver"}],"defaultStatus":"unaffected","cpes":[],"source":"mongodb","url":"https://www.cve.org/CVERecord?id=CVE-2026-114651"}],"remediation":[],"references":["https://jira.mongodb.org/browse/CSHARP-6170","https://github.com/mongodb/mongo-csharp-driver/releases/tag/v3.13.0","https://github.com/mongodb/mongo-csharp-driver/security/advisories/GHSA-f8xm-c88f-wq46"],"sources":[{"name":"CVE","id":"CVE-2026-114651","modified":"2026-10-30T19:25:16.427Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-114651"}],"assessments":[{"source":"mongodb","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N","score":6.3},{"source":"mongodb","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N","score":4}],"sourceAffected":[],"observedAt":"2026-10-30T19:39:32.226Z","kev":{"status":"not-listed","checkedAt":"2026-10-31T13:55:32.867Z"},"coverage":[{"source":"NVD","status":"available","checkedAt":"2026-10-30T19:45:33.543Z","attemptedAt":"2026-10-30T19:45:33.543Z"},{"source":"GHSA","status":"no-result","checkedAt":"2026-10-30T19:45:33.251Z","attemptedAt":"2026-10-30T19:45:33.251Z"},{"source":"EUVD","status":"available","checkedAt":"2026-10-30T19:45:32.777Z","attemptedAt":"2026-10-30T19:45:32.777Z"},{"source":"EPSS","status":"available","checkedAt":"2026-10-30T19:45:33.463Z","attemptedAt":"2026-10-30T19:45:33.463Z"}],"evidence":[{"source":"ENISA EUVD","id":"EUVD-2026-108322","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-108322","modified":"Oct 22, 2026, 8:38:23 PM","score":6.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N","checkedAt":"2026-10-30T19:45:32.777Z"},{"source":"FIRST EPSS","id":"CVE-2026-114651","url":"https://www.first.org/epss/","probability":0.00391,"percentile":0.33201,"date":"2026-10-30","checkedAt":"2026-10-30T19:45:33.463Z"},{"source":"NVD","id":"CVE-2026-114651","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-114651","modified":"2026-10-23T19:45:03.547","score":6.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:L/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":"2026-10-30T19:45:33.543Z"},{"source":"NVD","id":"CVE-2026-114651","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-114651","modified":"2026-10-23T19:45:03.547","score":4,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N","checkedAt":"2026-10-30T19:45:33.543Z"}],"aiSummary":{"text":"The MongoDB C# Driver's BSON deserialization component has a memory-handling weakness, potentially causing data leaks when parsing specially crafted input. An unauthenticated party can supply malicious data, disclosing limited information from other requests. The weakness affects version 2.26.0.","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-10-31T05:26:10.933Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-114651"}]}}