CVE-2026-77938
CVE-2026-77938 · Letta through 0.16.8 Credential Exposure via Tool Sandbox Environment Inheritance
This page contains facts from public vulnerability sources. Check the original advisory before updating.
Letta through 0.16.8 contains an information disclosure vulnerability that allows users running tools to read server secrets because LocalSandbox subprocesses inherit the full server environment. Attackers can run code via POST /v1/tools/run or custom tools to read LETTA_PG_URI, POSTGRES_PASSWORD, and provider API keys, then access cross-tenant database data.
CVSS 7.1 · High · EPSS 0.3%
- Published
- Updated
Affected products and versions
letta
- Versions
- ≥ 0, ≤ 0.16.8: Affected (semver)
No fix published
Original sources
- https://www.lasso.security/vulnerability-database/cve-2026-77938
- https://github.com/letta-ai/letta/blob/1131535716e8a31c9a437f8695e25ac98f203a24/letta/services/tool_sandbox/base.py#L487
- https://www.vulncheck.com/advisories/letta-through-0.16.8-credential-exposure-via-tool-sandbox-environment-inheritance
- https://nvd.nist.gov/vuln/detail/CVE-2026-77938