CRITICAL 9.3 NVD
CVE-2026-77936
Letta through 0.16.8 ships a compose.yaml that does not enable LETTA_SERVER_SECURE, so the password middleware is never added and all API routes are unauthentic
Letta through 0.16.8 ships a compose.yaml that does not enable LETTA_SERVER_SECURE, so the password middleware is never added and all API routes are unauthenticated, and it exposes a superuser PostgreSQL port with default credentials. Remote attackers can execute arbitrary Python via POST /v1/tools/run, manage /v1/admin users, or run OS commands via COPY PROGRAM.
References
- https://github.com/letta-ai/letta/blob/1131535716e8a31c9a437f8695e25ac98f203a24/compose.ya
- https://github.com/letta-ai/letta/blob/1131535716e8a31c9a437f8695e25ac98f203a24/letta/serv
- https://www.lasso.security/vulnerability-database/cve-2026-77936
- https://www.vulncheck.com/advisories/letta-through-0.16.8-insecure-default-configuration-u
This critical severity vulnerability with a CVSS score of 9.3 was published on 2026-10-20 via NVD.
Risk Timeline
CVE Disclosed2026-10-20 · -1 days ago
Remediation Resources
Official Advisory
www.lasso.security/vulnerability-database/cve-2026-77936
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