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CVE-2026-42863

8.1 · HIGH

Flowise is a drag & drop user interface to build a customized large language model flow.

Published Jun 8, 2026CWE-284EPSS 0.37%

Overview

CVE-2026-42863 is a high-severity vulnerability. It was published on June 8, 2026 and has a CVSS 3.1 base score of 8.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

Flowise is a drag & drop user interface to build a customized large language model flow. Prior to version 3.1.2, a mass assignment vulnerability exists in the chatflow update endpoint of FlowiseAI. The endpoint allows clients to modify server-controlled properties such as deployed, isPublic, workspaceId, createdDate, and updatedDate when updating a chatflow object. Due to missing server-side validation and authorization checks, an authenticated user can manipulate internal attributes of a chatflow and reassign it to another workspace. This allows cross-workspace resource reassignment and unauthorized modification of deployment and visibility settings. This issue has been patched in version 3.1.2.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/FlowiseAI/Flowise/releases/tag/flowise%403.1.2GitHubgithub.com/FlowiseAI/Flowise/security/advisories/GHSA-5wxp-qjgq-fx6mGitHubgithub.com/FlowiseAI/Flowise/security/advisories/GHSA-5wxp-qjgq-fx6m

How CyberStrike helps

Frequently asked questions

What is CVE-2026-42863?

CVE-2026-42863 is a high-severity vulnerability. It was published on June 8, 2026 and has a CVSS 3.1 base score of 8.1 (HIGH).

How severe is CVE-2026-42863?

This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-42863?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-42863?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-42863 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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