CVE-2026-109437

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 4.0

9.2CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS 3.1

9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

0.8% chance of exploitation in the next 30 days; higher than 55% of CVEs (scores of 2026-10-25)

CWEs

CWE-306, CWE-1188

Published

2026-10-19

Modified

2026-10-20

Record from

the NVD, synced 2026-10-21

References

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

Check your stackJSON