{"id":"CVE-2026-106435","revision":"3e4d6cbe08584036b21923831a029680","records":[{"revision":"3e4d6cbe08584036b21923831a029680","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-106435","aliases":[],"title":"Application denial of service via out-of-bounds read in BSON Regex decoding in MongoDB Python Driver","description":"The MongoDB Python Driver's binary accelerator can read outside a buffer when an application decodes malformed BSON containing a truncated regular-expression element without a trailing NUL byte. An actor who can supply BSON to the documented decode or decode_all API can cause the application process to terminate when the C extension is loaded. The driver's normal database wire-protocol path does not reach this code.","state":0,"publishedAt":"2026-10-08T20:12:15.074+00:00","modifiedAt":"2026-10-09T11:49:28.787+00:00","affected":[{"ecosystem":"Vendor product","name":"Python Driver","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"MongoDB\",\n                    \"product\": \"Python Driver\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"0.10.3\",\n                            \"lessThanOrEqual\": \"4.18.2\",\n                            \"versionType\": \"semver\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\"\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","score":5.9,"severity":"MEDIUM"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","score":5.1,"severity":"MEDIUM"}],"references":["https://jira.mongodb.org/browse/PYTHON-6110"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-106435","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-106435","identifiers":["CVE-2026-106435"]},"retained":false,"historicalAffected":[]}],"coverage":[]}