CVE-2026-46442
CriticalExploitedPublic exploitFlowiseAI: Authenticated Host RCE via POST /api/v1/node-custom-function and NodeVM Sandbox Escape
Published May 14, 2026 · Updated Aug 12, 2026 · Also known as GHSA-9rvc-vf7m-pgm2
Key Facts
Patch immediately- CVE-2026-46442 is a critical-severity vulnerability (CVSS 9.4 v4) affecting Flowise (Flowiseai).
- It is exploited in the wild, listed in Industry KEV feed, CIRCL KEV since Jul 17, 2026. Public exploit code is available.
- EPSS estimates a 3.4% probability of exploitation in the next 30 days.
- Fixed versions are available, including Flowise 3.1.2.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v4
9.4
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
EPSS (30-day exploit likelihood)
3.4%
Higher than 88.7% of all scored CVEs
Exploited in the wild
Yes
2 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2026-46442 brief as a PDF
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Description
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 attacker to reach the host process object and execute system commands via child_process. The result is authenticated remote code execution on the Flowise server host. This issue has been patched in version 3.1.2.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| Industry KEV feed | Jul 17, 2026 | n/a | Not reported |
| CIRCL KEV | Jul 17, 2026 | n/a | Not reported |
Required action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Affected Products
3 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| FlowiseFlowiseai | >= < 3.1.2 | 3.1.2 |
Patched Releases
Flowise
3.1.2
Timeline
Publicly disclosed
May 14, 2026
Added to Industry KEV feed
Jul 17, 2026
Added to CIRCL KEV
Jul 17, 2026
Last updated
Aug 12, 2026
Weakness Type
- CWE-94 Improper Control of Generation of Code ('Code Injection')
References
- advisoryGHSA advisory
- advisoryhttps://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46442.json
- advisoryhttps://github.com/FlowiseAI/Flowise/releases/
- advisoryhttps://github.com/FlowiseAI/Flowise/security/advisories/
- advisoryhttps://nvd.nist.gov/vuln/detail/CVE-2026-46442
FAQ
Common Questions.
Flowise is a drag & drop user interface to build a customized large language model flow.
Affected: Flowise (Flowiseai) versions >= < 3.1.2. The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed, CIRCL KEV since Jul 17, 2026.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including Flowise 3.1.2.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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