Flowise before 3.1.3 Prompt Injection RCE via CSV Agent (CVE-2026-73487) | HOL Guard CVE

Critical · CVSS 9.0CVE-2026-73487

Flowise before 3.1.3 Prompt Injection RCE via CSV Agent

Answer in brief

CVE-2026-73487 records a Critical severity (CVSS 9.0) vulnerability in Flowise before 3.1.3 Prompt Injection RCE via CSV Agent. The current sources do not mark it as known exploited. The current feed maps FlowiseAI/Flowise (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 13, 2026Updated Sep 3, 2026Source checked Sep 28, 2026First seen by HOL Aug 13, 2026Material review Sep 3, 2026

Upstream Advisory

Key facts

Risk: Critical · CVSS 9.0
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 9.0. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps FlowiseAI/Flowise (generic). Check affected ranges and fixed versions before updating.

Affected products and reported versions
Product	Affected versions	Fixed versions
cpe:2.3:a:flowiseai:flowise::::::::	Not reported	Not reported

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
FlowiseAI/Flowisegeneric	>=0 <3.1.3	3.1.3

Recommended response

Check inventory. Check lockfiles and deployed manifests for FlowiseAI/Flowise.
Review the reported fix. Update FlowiseAI/Flowise to 3.1.3 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 13, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 3, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 13, 2026

Sources and claim methodology

Upstream source description

Flowise before 3.1.3 contains a regex-based Python code validator bypass in CSV and Airtable Agent nodes that allows unauthenticated attackers to inject malicious code via prompt injection. Attackers can exploit unblocked pandas functions like pd.read_json() to exfiltrate datasets, perform SSRF against internal services, or achieve code execution through the unauthenticated prediction API.

Quoted source text, attributed separately from HOL analysis.