CVE-2026-82273
Mastra Memory API Thread Ownership Check Is a No-op When mapUserToResourceId Is Unset
CVSS 4.0 7.1 HIGHCVSS 3.1 6.5 MEDIUMCheck source for fixed versionsKEV status unknown
cve-program · CVE-2026-82273
PublishedMastra 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.
Read the publisher's advisoryAffected versions, risk and source history
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CVE-2026-82273 · CVE overview and exploitation status
cve-program · CVE-2026-82273
- https://github.com/mastra-ai/mastra/issues/18911
- https://github.com/mastra-ai/mastra
- https://github.com/mastra-ai/mastra/blob/b7e66f0c478a227985e0062794ef058c3714fabf/packages/server/src/server/handlers/utils.ts
- https://www.vulncheck.com/advisories/mastra-memory-api-thread-ownership-check-is-a-no-op-when-mapusertoresourceid-is-unset
Related changes
Linked by CVE identifierNo related changes are available here.