CVE-2026-70477
criticalFlowise is a drag & drop user interface to build a customized large language model flow.
Vendor / product: Flowiseai — flowise
Flowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.3, a prompt injection sent to a chatflow using a CSV Agent node can cause the LLM to respond with a malicious Python script that bypasses the blocklist validator and executes in an unsandboxed Pyodide environment. The specific flaw exists within the run method of the CSV_Agents class, where untrusted data is used to construct an LLM prompt and the resulting pythonCode is validated by validatePythonCodeForDataFrame before execution. An attacker can leverage this to execute arbitrary code in the context of the service account. This issue is fixed in 3.1.3.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Affected products
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
References
- https://github.com/FlowiseAI/Flowise/commit/f4e2794f6a576b94578f2fdafbf49c2fb304626c security-advisories@github.com
- https://github.com/FlowiseAI/Flowise/pull/6499 security-advisories@github.com
- https://github.com/FlowiseAI/Flowise/releases/tag/flowise@3.1.3 security-advisories@github.com
- https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-5xvg-pmgg-3mxr security-advisories@github.com
- https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-5xvg-pmgg-3mxr 134c704f-9b21-4f2e-91b3-4a467353bcc0