Vulnerability · Published Aug 6, 2026 · Assigned by VulDB
CVE-2026-18990letta-ai LettaBot API Status Route server.ts missing authentication
High 7.3
In plain English
A high-severity missing authentication in LettaBot from letta-ai. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 53% of all known vulnerabilities).
Official description
A vulnerability was detected in letta-ai LettaBot 0.2.0. Impacted is an unknown function of the file src/api/server.ts of the component API Status Route. The manipulation results in missing authentication. The attack may be performed from remote. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Affected products (as reported)
Weakness: CWE-306, CWE-287 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
References
- VDB-386359 | letta-ai LettaBot API Status Route server.ts missing authentication vdb-entry
- VDB-386359 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
- CVE-2026-18990 | CVE Analysis and Report third-party-advisory
- Submit #862562 | letta-ai LettaBot 0.2.0 Missing Authentication for Critical Function (CWE-306) third-party-advisory
- Submit #862622 | letta-ai lettabot v0.2.0-alpha.13 Missing Authentication for Critical Function (CWE-306) (Duplicate) third-party-advisory
- https://gist.github.com/YLChen-007/2ba2e586f3d16cb368c8dcd6ef680178 exploit