CVE-2026-109437CWE-1188CWE-306

CVE-2026-109437

Critical · published October 19, 2026

CVSS v3.1
9.8
EPSS
1%
Percentile
48.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
9.2 · 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
EPSS
0.00608 · 48.4th percentile
Weaknesses
CWE-1188 · Initialization of a Resource with an Insecure Default; CWE-306 · Missing Authentication for Critical Function
Published
2026-10-19T23:17Z
References (3)
https://github.com/CognicellAI/Cognition/releases/tag/v0.13.0 · [email protected]https://www.lasso.security/vulnerability-database/cve-2026-109437 · [email protected]https://www.vulncheck.com/advisories/cognition-unauthenticated-rce-via-local-shell-backend · [email protected]
EPSS history
Timeline
  • 21 OCT 03:27Z
    EPSS moved — → 1%
    epss
  • 19 OCT 18:22Z
    Cognition < 0.13.0 Unauthenticated RCE via Local Shell Backend
    cvelistv5
  • 19 OCT 18:22Z
    Cognition < 0.13.0 Unauthenticated RCE via Local Shell Backend
    cvelistv5