{"id":"CVE-2026-116575","revision":"10483de1d4ac40079835da4632aec02f","records":[{"revision":"10483de1d4ac40079835da4632aec02f","observedAt":"2026-10-27T15:44:06.157+00:00","statement":{"source":"cve-program","id":"CVE-2026-116575","aliases":[],"title":"Mem0: Cross-tenant conversation leak via unescaped delimiter collision in session-scope key (_build_session_scope)","description":"Mem0 provides persistent memory infrastructure for AI agents and applications. Prior to Python SDK 2.0.18 and TypeScript SDK 3.1.6, _build_session_scope() in mem0/memory/main.py and Memory.buildSessionScope() in the TypeScript SDK join caller-controlled user_id, agent_id, and run_id values using unescaped & and = delimiters. A caller can embed another scope component in a controlled identifier so that distinct tenant tuples produce the same session_scope key. Memory.add(), AsyncMemory.add(), and the REST POST /memories flow use that key to read and save recent raw messages, allowing cross-tenant conversation disclosure and eviction or interleaving of another tenant's history. This issue is fixed in Python SDK 2.0.18 and TypeScript SDK 3.1.6.","state":0,"publishedAt":"2026-10-26T20:15:01.875+00:00","modifiedAt":"2026-10-27T14:18:25.039+00:00","affected":[{"ecosystem":"Vendor product","name":"mem0","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"mem0ai\",\n                    \"product\": \"mem0\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 2.0.18\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N","score":6.3,"severity":"MEDIUM"}],"references":["https://github.com/mem0ai/mem0/security/advisories/GHSA-5324-3w58-qpp2","https://github.com/mem0ai/mem0/pull/6892","https://github.com/mem0ai/mem0/commit/71f2ebefa3494da21550fb525216818776cde67f","https://github.com/mem0ai/mem0/releases/tag/ts-v3.1.6","https://github.com/mem0ai/mem0/releases/tag/v2.0.18"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-116575","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-116575","identifiers":["CVE-2026-116575"]},"retained":false,"historicalAffected":[]}],"coverage":[]}