CVE-2026-41268: flowise Input Validation Flaw — Exploit

Description

Flowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.0, Flowise is vulnerable to a critical unauthenticated remote command execution (RCE) vulnerability. It can be exploited via a parameter override bypass using the FILE-STORAGE:: keyword combined with a NODE_OPTIONS environment variable injection. This allows for the execution of arbitrary system commands with root privileges within the containerized Flowise instance, requiring only a single HTTP request and no authentication or knowledge of the instance. This vulnerability is fixed in 3.1.0.

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CVSS v3.1 Score

9.8

CRITICAL

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

EPSS — Exploit Prediction

0.0112

Probability of exploitation

0.78%

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-20 Improper Input Validation

Affected Products

Vendor	Product	Versions
flowiseai	flowise	< 3.1.0

References

Advisories & Patches

https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-cvrr-qhgw-2mm6 https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-cvrr-qhgw-2mm6

Exploits

https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-cvrr-qhgw-2mm6 https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-cvrr-qhgw-2mm6

Frequently Asked Questions

What is CVE-2026-41268? +

Flowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.0, Flowise is vulnerable to a critical unauthenticated remote command execution (RCE) vulnerability. It can be exploited via a parameter override bypass using the FILE-STORAGE:: keyword combined with a NODE_OPTIONS environment variable injection. This allows for the execution of arbitrary system commands with root privileges within the containerized Flowise instance, requiring only a single HTTP request and no authentication or knowledge of the instance. This vulnerability is fixed in 3.1.0. It has a CVSS v3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2026-41268? +

CVE-2026-41268 has a CVSS v3.1 score of 9.8 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately. The EPSS score is 0.0112, placing it in the 1th percentile for exploitation probability.

What products are affected by CVE-2026-41268? +

CVE-2026-41268 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-2026-41268? +

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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