CVE-2026-109437

CRITICAL

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.

CVSS v3.1 Score

9.8
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Published: 10/19/2026Modified: 10/20/2026

Related Intelligence (1)

CRITICALVulnerability

NVD CRITICAL: CVE-2026-109437 — Cognition before 0.13.0 contains an unauthenticated remote code execution vulner...

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

CVE-2026-109437
NIST NVD

References (3)

https://github.com/CognicellAI/Cognition/releases/tag/v0.13.0https://www.lasso.security/vulnerability-database/cve-2026-109437https://www.vulncheck.com/advisories/cognition-unauthenticated-rce-via-local-shell-backend