What is CVE-2026-42863?

CVE-2026-42863 is a high-severity vulnerability in Flowiseai Flowise, classified under Improper Access Control. CVSS score: 8.1/10. Published 2026-06-08.

How severe is CVE-2026-42863?

High severity. CVSS v3 base score is 8.1 out of 10.

Auth bypass in Flowiseai Flowise

CVE-2026-42863

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 ser…

EPSS: 0.003 (18.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.

Affected products

Flowiseai Flowise — versions < 3.1.2

Weakness classification (CWE)

References

security-advisories@github.com (Product, x_refsource_MISC, Release Notes)
security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)

Frequently asked questions

What is CVE-2026-42863?: CVE-2026-42863 is a high-severity vulnerability in Flowiseai Flowise, classified under Improper Access Control. CVSS score: 8.1/10. Published 2026-06-08.
How severe is CVE-2026-42863?: High severity. CVSS v3 base score is 8.1 out of 10.