{"id":"CVE-2026-106436","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-106436","generatedAt":"2026-10-27T23:59:30.046Z","title":"The BSON encoder in the MongoDB PHP Driver does not check some return values after a document exceeds libbson's size limit.","description":"The BSON encoder in the MongoDB PHP Driver does not check some return values after a document exceeds libbson's size limit. This can leave the encoder in an invalid state. An unauthenticated actor who can cause an affected application to encode an unusually large data structure can terminate the PHP worker or cause the resulting document to omit fields. No MongoDB server connection or database authentication is required.","published":"2026-10-08T20:17:31.000Z","lastModified":"2026-10-13T20:13:17.000Z","status":"Analyzed","sourceIdentifier":"cna@mongodb.com","cvss":{"version":"4.0","score":6.3,"severity":"MEDIUM","vector":"CVSS:4.0/AV:N/AC:L/AT:P/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/M"},"cwe":["CWE-252"],"affected":["mongodb/php driver"],"epss":{"score":0.00256,"percentile":0.17069,"date":"2026-10-26","history":[{"date":"2026-10-09","score":0.00257,"percentile":0.1601}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.26%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-08T20:17:31.000Z","detail":{"score":"6.3","severity":"MEDIUM","publishedAt":"2026-10-08T20:17:31.087Z"},"summary":"New CVE, medium severity (CVSS 6.3)."}],"references":[{"url":"https://jira.mongodb.org/browse/PHPC-2739","tags":["Vendor Advisory","Issue Tracking"],"source":"cna@mongodb.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-106436","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."}