CVE-2026-41270

Description

Flowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.0, a Server-Side Request Forgery (SSRF) protection bypass vulnerability exists in the Custom Function feature. While the application implements SSRF protection via HTTP_DENY_LIST for axios and node-fetch libraries, the built-in Node.js http, https, and net modules are allowed in the NodeVM sandbox without equivalent protection. This allows authenticated users to bypass SSRF controls and access internal network resources (e.g., cloud provider metadata services) This vulnerability is fixed in 3.1.0.

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CVSS v3.1 Score

7.1

HIGH

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L

EPSS — Exploit Prediction

0.0007

Probability of exploitation

0.22%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-284 CWE-284

CWE-918 Server-Side Request Forgery (SSRF)

Affected Products

Vendor	Product	Versions
flowiseai	flowise	< 3.1.0

References

Advisories & Patches

https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-xhmj-rg95-44hv https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-xhmj-rg95-44hv

Exploits

https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-xhmj-rg95-44hv https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-xhmj-rg95-44hv

Frequently Asked Questions

What is CVE-2026-41270? +

Flowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.0, a Server-Side Request Forgery (SSRF) protection bypass vulnerability exists in the Custom Function feature. While the application implements SSRF protection via HTTP_DENY_LIST for axios and node-fetch libraries, the built-in Node.js http, https, and net modules are allowed in the NodeVM sandbox without equivalent protection. This allows authenticated users to bypass SSRF controls and access internal network resources (e.g., cloud provider metadata services) This vulnerability is fixed in 3.1.0. It has a CVSS v3.1 base score of 7.1 (HIGH).

How severe is CVE-2026-41270? +

CVE-2026-41270 has a CVSS v3.1 score of 7.1 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0007, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-41270? +

CVE-2026-41270 affects products from flowiseai, specifically: flowise. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-41270? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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