CVE-2026-67621: Flowise 3.1.4 Missing Authorization on Document Store Mutation Endpoints

Severity: high (CVSS 7.6 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-08-06 · updated 2026-10-24
Weakness: CWE-862

Description

Flowise through 3.1.4 contains a missing authorization vulnerability that allows authenticated workspace members to perform unauthorized document store operations by accessing unprotected mutation endpoints. Attackers holding only view-level permissions can send direct HTTP requests to the upsert and refresh document store routes to trigger document ingestion, refresh vector database contents, consume embedding API credits, and modify knowledge bases used by downstream chatflows.

Affected products

FlowiseAI Flowise: through 3.1.4

References

https://flowiseai.com/sunset
https://github.com/Caycon/cve-advisories/blob/main/2026/Flowise/CVE-2026-67621.md
https://www.vulncheck.com/advisories/flowise-missing-authorization-on-document-store-mutation-endpoints

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