Vulnerability details

CVE-2026-109437

CognicellAI Cognition

Cognition < 0.13.0 Unauthenticated RCE via Local Shell Backend

CVSS 4.0

9.2Critical

Official 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.

CVSS scores

Score	Version	Source	Vector
9.2Critical	4.0	CVEProject cvelistV5 (CNA) (VulnCheck)	`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`
9.8Critical	3.1	CVEProject cvelistV5 (CNA) (VulnCheck)	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`

Affected products

Vendor	Product	Versions	Source
CognicellAI	Cognition	v < 0.13.0	CVEProject cvelistV5 (CNA)

References and advisories

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

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Details

Published: 2026-10-19
Last updated: 2026-10-23
State: Published
Assigner (CNA): VulnCheck
Kolun priority: 38 · Medium

Exploit prediction (EPSS)

0.77%

Probability of exploitation in 30 days

56%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: No
Exploitation: Proof of concept
Technical impact: Total

Weaknesses (CWE)

CWE-1188
Initialization of a Resource with an Insecure Default
CWE-306
Missing Authentication for Critical Function