Description
Letta through 0.16.8 contains an authentication bypass vulnerability that allows API callers to impersonate other users by supplying a self-asserted user_id HTTP header. Attackers can set user_id to another tenant's ID, even with LETTA_SERVER_SECURE enabled, to read and modify that user's agents, memory and configuration.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| letta-ai | letta | ≤ 0.16.8 | — |
References
- Lasso.security Advisory technical-description exploit
- https://github.com/letta-ai/letta/blob/1131535716e8a31c9a437f8695e25ac98f203a24/letta/server/rest_api/dependencies.py#L39 technical-description
- VulnCheck Advisory: Letta through 0.16.8 Cross-Tenant Impersonation via user_id Header third-party-advisory