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Flowise CVE-2026-73485

| EUVDEUVD-2026-57801 CRITICAL
Code Injection (CWE-94)
2026-08-13 VulnCheck GHSA-jqhx-m5fh-f7g2
Python Code Injection RCE Flowise
9.0
CVSS 4.0 · Vendor: VulnCheck
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Severity by source

Vendor (VulnCheck) PRIMARY
9.0 CRITICAL
CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vuln.today AI
10.0 CRITICAL

Description states unauthenticated network exploitation (PR:N) and a reusable denylist bypass (AC:L); pyodide-to-host execution changes scope (S:C) with full host CIA impact.

3.1 AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Primary rating from Vendor (VulnCheck).

CVSS VectorVendor: VulnCheck

CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
X

Lifecycle Timeline

3
Patch available
Aug 13, 2026 - 13:01 EUVD
Analysis Generated
Aug 13, 2026 - 12:51 vuln.today
CVE Published
Aug 13, 2026 - 11:28 cve.org
CRITICAL 9.0

DescriptionCVE.org

Flowise before 3.1.3 contains a code injection vulnerability in the Airtable Agent node that allows unauthenticated attackers to execute arbitrary Python code by bypassing the pythonCodeValidator blocklist through obfuscation techniques. Attackers can send crafted prompts to a chatflow using the Airtable Agent node to inject malicious Python code that executes in an unsandboxed pyodide environment with full access to the host operating system.

Articles & Coverage 1

News Critical RCE in Flowise Python Agent Node before 3.1.3 - CVE-2026-73485 Aug 14, 2026

AnalysisAI

Remote code execution in Flowise before 3.1.3 lets attackers run arbitrary Python on the host by abusing the Airtable Agent node. Crafted chatflow prompts carry obfuscated Python that slips past the pythonCodeValidator blocklist and executes inside an unsandboxed pyodide runtime with full access to the underlying OS. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Locate exposed Flowise chatflow with Airtable Agent node
Delivery
Craft obfuscated Python payload
Exploit
Submit as chatflow prompt
Execution
Bypass pythonCodeValidator blocklist
Persist
Execute code in unsandboxed pyodide
Impact
Full host OS compromise
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Vulnerability AssessmentAI

Exploitation Requires a reachable Flowise chatflow (version < 3.1.3) that includes the Airtable Agent node and accepts prompts, plus a Python payload obfuscated to bypass the pythonCodeValidator blocklist. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment This is a genuine high-priority issue: unauthenticated (per description) network-reachable RCE with full host impact (VC:H/VI:H/VA:H and subsequent-system SC/SI/SA:H), landing at CVSS 4.0 base 9.0. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker discovers an internet-exposed Flowise chatflow that wires in the Airtable Agent node and submits a prompt containing Python obfuscated to evade the pythonCodeValidator blocklist. The reconstructed payload executes in the unsandboxed pyodide runtime, giving the attacker command execution as the Flowise process and a foothold on the host. …
Remediation Vendor-released patch: upgrade to Flowise 3.1.3 or later per GHSA-c5hr-rc98-xp3g (https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-c5hr-rc98-xp3g). … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours, inventory all Flowise instances across production and development environments, document the deployed versions, and immediately disable the Airtable Agent node across all instances pending patching. …

Sign in for detailed remediation steps and compensating controls.

Threat intelligence, references, and detailed analysis are available after sign-in.

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CVE-2026-73485 vulnerability details – vuln.today
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