CVE-2026-77937

LOWCVSS 8.6 · HIGH

Immediate actions

Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

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.

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0.0/ 10 priority

Sources & remediation

Other references

Weakness type (CWE)

CWE-639

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Deep dive

Full discourse1 post

Harsha Hegde@HarshaHegde021h
All 13 👇 DB-GPT: CVE-2026-77932 (9.8), CVE-2026-77933 (9.8) Letta: CVE-2026-77936 (9.8), CVE-2026-77937 Langchain-Chatchat: CVE-2026-75128 (9.8) piflow: CVE-2026-109442 (9.8) Coze Studio: CVE-2026-77934, CVE-2026-77935 Aix-DB: CVE-2026-77926 OpenSRE: CVE-2026-109444 JoySafeter: CVE-2026-109443 EvoScientist: CVE-2026-77930 LangAlpha: CVE-2026-109440 only coze studio has a fix so far (0.5.0) Full breakdown: https://severitydaily.com/ai-agent-frameworks-thirteen-records-vulncheck-lasso-cwe-306-cwe-1188-shipped-defaults-no-fixed-version/
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