CVE-2026-109437

CRITICAL 9.8

Cognition < 0.13.0 Unauthenticated RCE via Local Shell Backend

CVSS Score

9.8

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-1188 CWE-306
Vendor	cognicellai
Product	cognition
Published	Oct 19, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

CognicellAI / Cognition

0 < 0.13.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

Noy Pearl Michael Sromin Ophir Dror