{"id":"CVE-2026-75110","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-75110","summary":"MemOS is a memory operating system for LLMs and AI agents. In deployments where authentication is enabled (AUTH_ENABLED=true) but the undocumented, defaultless INTERNAL_SERVICE_SECRET…","details":"MemOS is a memory operating system for LLMs and AI agents. In deployments where authentication is enabled (AUTH_ENABLED=true) but the undocumented, defaultless INTERNAL_SERVICE_SECRET environment variable is unset, the is_internal_request() check in src/memos/api/middleware/auth.py fails open: os.getenv(\"INTERNAL_SERVICE_SECRET\") returns None and a request omitting the X-Internal-Service header also yields None, so the comparison None == None evaluates true. The request is then treated as a trusted internal principal and granted scopes: [\"all\"]. As a result, an unauthenticated remote attacker can reach the admin API-key management endpoints to mint API keys for any user, enumerate keys, revoke keys, and generate a master key for persistent privileged access, as well as all data endpoints.","published":"2026-08-17T21:16:50.043","modified":"2026-08-17T21:16:50.043","cvss":{"score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":null,"references":[{"type":"WEB","url":"https://github.com/MemTensor/MemOS"},{"type":"WEB","url":"https://github.com/MemTensor/MemOS/blob/main/src/memos/api/middleware/auth.py"},{"type":"WEB","url":"https://github.com/MemTensor/MemOS/issues/2259"},{"type":"WEB","url":"https://www.vulncheck.com/advisories/memos-authentication-bypass-via-unset-internal-service-secret"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-08-17T21:16:50.043"}}