CVE-2026-77938
Medium
Description
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.
SeverityMedium
CVSS6.5
Exploit probability—
ProductLetta
PublishedOct 20, 2026
First seenOct 20, 2026
Weakness typeCWE-526CWE-526
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| letta-ai letta | v ≤ 0.16.8 | — |
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