{"id":"CVE-2026-75110","summary":"MemOS Authentication Bypass via Unset 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.","modified":"2026-08-20T03:30:11.956523787Z","published":"2026-08-17T20:36:04.095Z","database_specific":{"cna_assigner":"VulnCheck","cwe_ids":["CWE-697"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/75xxx/CVE-2026-75110.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/75xxx/CVE-2026-75110.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-75110"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/memos-authentication-bypass-via-unset-internal-service-secret"},{"type":"REPORT","url":"https://github.com/MemTensor/MemOS/issues/2259"},{"type":"PACKAGE","url":"https://github.com/MemTensor/MemOS"},{"type":"ARTICLE","url":"https://github.com/MemTensor/MemOS/blob/main/src/memos/api/middleware/auth.py"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/memtensor/memos","events":[{"introduced":"0"},{"last_affected":"f4db521214c29337164ec788bafede7eab236c25"}],"database_specific":{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"0"},{"last_affected":"2.0.30"}]}}],"versions":["v2.0.30","memos-local-plugin-v2.0.14-beta.1","v2.0.27","v2.0.25","v2.0.24","v2.0.23","v2.0.22","v2.0.20","v2.0.19","v2.0.17","v2.0.16","v2.0.15","v2.0.13","v2.0.12","v2.0.11","v2.0.10","v2.0.8","v2.0.9","v2.0.7","v2.0.6","v2.0.5","v2.0.4","v2.0.2","v2.0.1","v2.0.0","v1.1.3","v1.1.1","v1.1.0","v1.0.1","v1.0.0","v0.2.2","v0.2.1","v0.2.0","v0.1.13","v0.1.12"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-75110.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"}]}