Flowise before 3.1.3 Sandbox Escape via Puppeteer (CVE-2026-73483) | HOL Guard CVE

Critical · CVSS 9.4CVE-2026-73483

Flowise before 3.1.3 Sandbox Escape via Puppeteer

Answer in brief

CVE-2026-73483 records a Critical severity (CVSS 9.4) vulnerability in Flowise before 3.1.3 Sandbox Escape via Puppeteer. 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 27, 2026First seen by HOL Aug 13, 2026Material review Sep 3, 2026

Upstream Advisory

Key facts

Risk: Critical · CVSS 9.4
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 9.4. 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 (packages flowise and flowise-components) in versions <= 3.1.2 contain a sandbox escape in the vm2/@flowiseai/nodevm JavaScript sandbox. An authenticated user with access to the /api/v1/node-custom-function endpoint can escape the sandbox by supplying attacker-controlled executablePath and args parameters to puppeteer.launch(), which internally invokes child_process.spawn() outside the sandbox boundary. This allows execution of arbitrary OS commands as the Flowise process user (root in the official Docker image) and arbitrary host file disclosure via Chromium's file:// URL handling. In versions 3.0.8–3.1.2 exploitation requires ALLOW_BUILTIN_DEP=true; earlier versions are exploitable by default. Fixed in 3.1.3.

Quoted source text, attributed separately from HOL analysis.