CVE-2026-67621

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.

CVSS v4.0

7.2 HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1

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

EPSS

0.27% chance of exploitation in the next 30 days, 19th percentile

Published

2026-08-06

Updated

2026-08-14

Proof-of-concept exploits (1)

• Caycon/cve-advisories/blob/main/2026/Flowise/CVE-2026-67621.md

References

• CVE Record
• NVD entry

Related

• CVE-2026-65708
• CVE-2026-65709
• CVE-2026-65710
• CVE-2026-67206
• CVE-2026-67207
• CVE-2026-67622