CVE-2026-77937
CVE-2026-77937 · Letta through 0.16.8 Cross-Tenant Impersonation via user_id Header
Cette page présente des faits issus de sources publiques. Consultez l’avis original avant toute mise à jour.
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.
CVSS 8.6 · Élevée · EPSS 0,5%
- Publication
- Mise à jour
Produits et versions concernés
letta
- Versions du logiciel
- ≥ 0, ≤ 0.16.8: Concernée (semver)
Aucun correctif publié
Sources originales
- https://www.lasso.security/vulnerability-database/cve-2026-77937
- https://github.com/letta-ai/letta/blob/1131535716e8a31c9a437f8695e25ac98f203a24/letta/server/rest_api/dependencies.py#L39
- https://www.vulncheck.com/advisories/letta-through-0.16.8-cross-tenant-impersonation-via-user-id-header
- https://nvd.nist.gov/vuln/detail/CVE-2026-77937