CVE-2026-46442: Flowise is a drag & drop user interface to build a customized large language model flow

Q: How do I fix CVE-2026-46442?

flowise: upgrade to 3.1.2. Exact commands for each OS are on this page.

Q: Is CVE-2026-46442 being exploited?

CVE-2026-46442 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-46442 affect?

CVE-2026-46442 affects flowise. Severity is critical (CVSS 9.9). Flowise is a drag & drop user interface to build a customized large language model flow. Prior to version 3.1.2, POST /api/v1/node-custom-function lacks route-level authorization, allowing any authenticated user or API key to submit arbitra

Q: How urgent is CVE-2026-46442?

Priority 64/100. Critical severity; EPSS top 2%: very likely to be exploited; Public exploit reference

This week

CRITICAL 9.9UPGRADE

CVE-2026-46442 is a critical-severity flaw (CVSS 9.9) affecting flowise. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Flowise is a drag & drop user interface to build a customized large language model flow. Prior to version 3.1.2, POST /api/v1/node-custom-function lacks route-level authorization, allowing any authenticated user or API key to submit arbitrary JavaScript to the Custom JS Function node. When E2B_APIKEY is not configured — the common deployment case — Flowise executes this code inside a NodeVM sandbox. This sandbox can be escaped, allowing an attack

Why this priority

Critical severity
EPSS top 2%: very likely to be exploited
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	9.9 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	36.3% (top 2%)
CISA exploited list	No
Weakness	CWE-94
Published	2026-06-08
Last modified	2026-07-23

Publisher (CNA): GitHub, Inc. · Vendor: flowiseai

Last updated 2026-07-23 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-08 16:16 UTCPublished CVE record published
2026-07-23 07:10 UTCUpdated Record last modified

flowiseai flowise UPGRADE

Affected: < 3.1.2

Fixed in: 3.1.2

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy flowise || rpm -q flowise || flowise --version

2. UPGRADE to 3.1.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade flowise

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade flowise

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Exact fixes by distribution

npm · flowise · FIXED · 3.1.2 · vulnerable: <= 3.1.1 · source

npm install flowise@">=3.1.2" npm ls flowise

Fedora 46 · arm-none-eabi-binutils-cs · FIXED · 2.47-1.fc46 · FEDORA-2026-7498616952 · source

sudo dnf upgrade --advisory=FEDORA-2026-7498616952

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

GitHub PoC: codeb0ssx/CVE-2026-46442-PoC (0 stars)
Write-up: github.com/FlowiseAI/Flowise/security/advisories/GHSA-9rvc-vf7m-pgm2
Nuclei scan template: Flowise < 3.1.2 - node-custom-function Unauthorized RCE

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-46442?

flowise: upgrade to 3.1.2. Exact commands for each OS are on this page.

Is CVE-2026-46442 being exploited?

CVE-2026-46442 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-46442 affect?

CVE-2026-46442 affects flowise. Severity is critical (CVSS 9.9). Flowise is a drag & drop user interface to build a customized large language model flow. Prior to version 3.1.2, POST /api/v1/node-custom-function lacks route-level authorization, allowing any authenticated user or API key to submit arbitra

How urgent is CVE-2026-46442?

Priority 64/100. Critical severity; EPSS top 2%: very likely to be exploited; Public exploit reference

Related CVEs

CVE-2026-41268 CRITICAL 9.8 UPGRADE Flowise is a drag & drop user interface to build a customized large language model flow
CVE-2026-41276 CRITICAL 9.8 UPGRADE Flowise is a drag & drop user interface to build a customized large language model flow
CVE-2026-40933 CRITICAL 9.9 UPGRADE Flowise is a drag & drop user interface to build a customized large language model flow
CVE-2026-41265 CRITICAL 9.8 UPGRADE Flowise is a drag & drop user interface to build a customized large language model flow
CVE-2026-41137 HIGH 8.8 UPGRADE Flowise is a drag & drop user interface to build a customized large language model flow

References

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