Vulnerability details

CVE-2026-109442

cas-bigdatalab piflow

piflow 2.0.0 through 2.0.1 Unauthenticated RCE via Chat Agent exec_shell

CVSS 4.0

9.3Critical

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.

CVSS scores

Score	Version	Source	Vector
9.3Critical	4.0	CVEProject cvelistV5 (CNA) (VulnCheck)	`CVSS:4.0/AV:N/AC:L/AT:N/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
cas-bigdatalab	piflow	2.0.0 ≤ v ≤ 2.0.1	CVEProject cvelistV5 (CNA)

References and advisories

https://www.lasso.security/vulnerability-database/cve-2026-109442 technical-descriptionexploit
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
https://www.vulncheck.com/advisories/piflow-2.0.0-through-2.0.1-unauthenticated-rce-via-chat-agent-exec-shell third-party-advisory

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Details

Published: 2026-10-20
Last updated: 2026-10-20
State: Published
Assigner (CNA): VulnCheck
Kolun priority: 38 · Medium

Exploit prediction (EPSS)

0.84%

Probability of exploitation in 30 days

58%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: Yes
Exploitation: Proof of concept
Technical impact: Total

Weaknesses (CWE)

CWE-306
Missing Authentication for Critical Function