{"schema":"threatline.record/2","record":{"id":"CVE-2026-106435","aliases":[],"summary":"Application denial of service via out-of-bounds read in BSON Regex decoding in MongoDB Python Driver","details":"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.","categories":["Runtimes & languages"],"product":"Python Driver","vendor":"MongoDB","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-106435","source_modified_at":"2026-10-09T11:49:28.787Z","fetched_at":"2026-10-23T18:48:36.087640Z","product":"Python Driver","vendor":"MongoDB","versions":[{"status":"affected","version":"0.10.3","lessThanOrEqual":"4.18.2","versionType":"semver"}],"defaultStatus":"unaffected"}],"fixed_versions":[],"cvss":5.9,"severity":"Medium","kev":{"listed":false},"epss":{"probability":0.00093,"percentile":0.00548,"score_date":"2026-10-23"},"published_at":"2026-10-08T20:12:15.074Z","modified_at":"2026-10-09T11:49:28.787Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-106435","fetched_at":"2026-10-23T18:48:36.087640Z","source_modified_at":"2026-10-09T11:49:28.787Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-106435","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://jira.mongodb.org/browse/PYTHON-6110"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"no","technical_impact":"partial","assessed_at":"2026-10-09T11:49:15.521416Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-09T11:49:28.787Z","content_hash":"965c4d7209425d6ac1cfa68e902758a2b1f2e09da50c4840ccde8da104e33f05"}}