CVE-2026-18990 letta-ai LettaBot API Status Route server.ts missing authentication
Remote attackers can access the LettaBot API status route without authentication, potentially exposing sensitive information or bypassing security controls.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-18990?
CVE-2026-18990 is a medium-severity missing authorization vulnerability in letta-ai LettaBot, published on 6 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
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.
Which versions are affected by CVE-2026-18990?
How do I fix CVE-2026-18990?
No fix has been published for CVE-2026-18990 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-18990 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-18990 exists.
Sources
Also known as GHSA-c8v3-2w4m-9q57.