CVE-2026-109437
Cognition < 0.13.0 Unauthenticated RCE via Local Shell Backend
- State
- Published
- Severity
- 9.2 Critical
- Published
- Oct 19, 2026
- Updated
- Oct 23, 2026
- Reserved
- Oct 12, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 9.2 Critical | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 9.8 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | VulnCheck |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
CognitionCognicellAI |
|
References
- Lasso.security Advisorytechnical-descriptionexploit
- Cognition v0.13.0 Release Notesrelease-notespatch
- VulnCheck Advisory: Cognition < 0.13.0 Unauthenticated RCE via Local Shell Backendthird-party-advisory
Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.