by Kastro
Paper/Archive/CVE-2026-109437

CVE-2026-109437

CognicellAI Cognition — Cognition < 0.13.0 Unauthenticated RCE via Local Shell Backend

EPSS 0.8%public exploitCVSS 9.8
critical.is priorityof 100
51
CVSS 9.8 (CNA)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 55.8.558 × 2011.2Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
Cognition< 0.13.00.13.0CNA

Scores by source

VulnCheck (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
VulnCheck (CNA)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
CISA ADPSSVCExploitation: poc · Automatable: no · Technical impact: total

References

exploitlasso.security/vulnerability-database/cve-2026-109437patchgithub.com/CognicellAI/Cognition/releases/tag/v0.13.0writeupvulncheck.com/advisories/cognition-unauthenticated-rce-via-local-shell-backend