EUVD-2026-57802
GHSA-xcrh-wphv-74q4
Severity by source
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
Network-reachable but requires a low-privilege account (PR:L) and crafting an obfuscated denylist bypass (AC:H); code escapes the interpreter to the host, so scope changes (S:C) with full C/I/A impact.
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
Lifecycle Timeline
3DescriptionCVE.org
Flowise before 3.1.3 contains a code injection vulnerability in the CSV Agent node's customReadCSV parameter that allows authenticated attackers to execute arbitrary Python code. The validator uses a static regex blocklist that can be bypassed through obfuscation techniques, enabling attackers to execute code in the unsandboxed pyodide environment with full system access.
Articles & Coverage 1
AnalysisAI
Authenticated arbitrary Python code execution in FlowiseAI Flowise before 3.1.3 arises from the CSV Agent node's customReadCSV parameter, whose regex-based validator can be defeated with obfuscation to run attacker-supplied code inside an unsandboxed pyodide runtime with full host access. Any user able to build or edit a chatflow can escalate from application-level access to code execution on the server. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an authenticated Flowise account with permission to create or modify a chatflow that uses the CSV Agent node, and the ability to set that node's customReadCSV parameter (CVSS PR:L confirms low-privilege authentication is needed; UI:N means no victim interaction is required once the attacker triggers the node). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The signals are mostly consistent and point to a genuine high-severity issue for exposed instances: the CVSS 4.0 vector (AV:N/AC:H/PR:L/UI:N with high vulnerable- and subsequent-system impact, base 9.0) reflects network reach, low-privilege authentication, no user interaction, and a scope-crossing impact into the host. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Vendor-released patch: 3.1.3 - upgrade Flowise to 3.1.3 or later, which is the primary and confirmed fix per GHSA-4878-cqgq-j53v (https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-4878-cqgq-j53v) and the VulnCheck advisory (https://www.vulncheck.com/advisories/flowise-before-code-injection-via-csv-agent-customreadcsv). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, audit all production Flowise deployments to identify current versions and restrict chatflow editing access to trusted administrators only. …
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Same weakness CWE-94 – Code Injection
View allSame technique Code Injection
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External POC / Exploit Code
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