CVE-2026-109437

Critical

Description

Cognition before 0.13.0 contains an unauthenticated remote code execution vulnerability due to defaulting its agent sandbox backend to local execution and shipping no authentication on its REST/SSE API. Attackers can create a session via POST /sessions and post a message via POST /sessions/{id}/messages without credentials, causing the Deep Agents ReAct loop to run attacker-directed shell commands through the local shell backend, resulting in remote code execution as the server process.

SeverityCritical

CVSS9.8

Exploit probability—

ProductCognition

PublishedOct 19, 2026

First seenOct 19, 2026

Weakness typeCWE-1188CWE-1188 CWE-306Missing authentication for critical function

How to fix

Update

CognicellAI Cognition0.13.0 or later

Patches

github.com/CognicellAI/Cognition/releases/tag/v0.13.0

Affected products

Product	Affected versions	Fixed in
CognicellAI Cognition	v < 0.13.0	0.13.0

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