CVE-2026-82273
Mastra Memory API Thread Ownership Check Is a No-op When mapUserToResourceId Is Unset
- State
- Published
- Severity
- 7.1 High
- Published
- Aug 28, 2026
- Updated
- Sep 24, 2026
- Reserved
- Aug 28, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 7.1 High | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 6.5 Medium | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N | VulnCheck |
Weaknesses
- CWE-862 Missing Authorization
Affected Products
| Product | Versions |
|---|---|
mastramastra-ai |
|
References
- GitHub Issue #18911issue-tracking
- https://github.com/mastra-ai/mastraproduct
- Vulnerable code: utils.tstechnical-description
- VulnCheck Advisory: Mastra Memory API Thread Ownership Check Is a No-op When mapUserToResourceId Is Unsetthird-party-advisory
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