Vulnerability · Published Oct 20, 2026 · Assigned by VulnCheck

CVE-2026-109442piflow 2.0.0 through 2.0.1 Unauthenticated RCE via Chat Agent exec_shell

Critical 9.8

In plain English

A critical-severity missing authentication in piflow from cas-bigdatalab. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 58% of all known vulnerabilities).

Severity (CVSS 3.1)9.8Critical

Exploit odds (30 days)0.8%top 42.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

piflow 2.0.0 through 2.0.1 contains a remote code execution vulnerability in its DeepAgents chat agent, whose POST /chat and POST /chat/stream endpoints lack authentication. Attackers can instruct the agent to call the exec_shell tool, which runs arbitrary commands via subprocess.run without human approval or an allow-list, exposing environment secrets such as LLM API keys and database credentials.

Affected products (as reported)

Vendor	Product	Versions
cas-bigdatalab	piflow	2.0.0 – through 2.0.1

Weakness: CWE-306 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Lasso.security Advisory technical-description, exploit
https://github.com/cas-bigdatalab/piflow/blob/ad8d0108a54a4257307d4946dc9250e26f24c63f/agents/tools.py#L114 technical-description
https://github.com/cas-bigdatalab/piflow/blob/ad8d0108a54a4257307d4946dc9250e26f24c63f/server.py#L615 technical-description
VulnCheck Advisory: piflow 2.0.0 through 2.0.1 Unauthenticated RCE via Chat Agent exec_shell third-party-advisory