{"id":"CVE-2026-82273","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-82273","summary":"Mastra through 1.63.0 contains an authentication bypass vulnerability in the memory API thread ownership validation when mapUserToResourceId callback is omitted from configuration.…","details":"Mastra through 1.63.0 contains an authentication bypass vulnerability in the memory API thread ownership validation when mapUserToResourceId callback is omitted from configuration. Authenticated attackers can enumerate all threads via GET /api/memory/threads and read conversation history and metadata of other resource owners.","published":"2026-08-28T20:20:18.227","modified":"2026-08-28T20:20:18.227","cvss":{"score":6.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":null,"references":[{"type":"WEB","url":"https://github.com/mastra-ai/mastra"},{"type":"WEB","url":"https://github.com/mastra-ai/mastra/blob/b7e66f0c478a227985e0062794ef058c3714fabf/packages/server/src/server/handlers/utils.ts"},{"type":"WEB","url":"https://github.com/mastra-ai/mastra/issues/18911"},{"type":"WEB","url":"https://www.vulncheck.com/advisories/mastra-memory-api-thread-ownership-check-is-a-no-op-when-mapusertoresourceid-is-unset"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-08-28T20:20:18.227"}}