RCE in Cognicellai Cognition
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.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- www.lasso.security/vulnerability-database/cve-2026-109437 (technical-description, exploit)
- github.com/CognicellAI/Cognition/releases/tag/v0.13.0 (release-notes, patch)
- www.vulncheck.com/advisories/cognition-unauthenticated-rce-via-local-shell-back… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-109437?
- CVE-2026-109437 is a critical-severity vulnerability in Cognicellai Cognition, classified under Missing Authentication for Critical Function. CVSS score: 9.8/10. Published 2026-10-19.
- How severe is CVE-2026-109437?
- Critical severity. CVSS v3 base score is 9.8 out of 10.