CVE-2026-100610 Flowise - Broken Access Control

Flowise through 3.1.4 contains a broken access control vulnerability caused by missing route-level permission and ownership validation in /api/v1/upsert-history endpoints, letting authenticated low-privilege users or valid API keys read or delete other users' upsert history, exploit requires knowledge of target chatflowId or record UUIDs.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.27% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Broken Access Control
Impact
Information Disclosure, Data Tampering
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
26 September 2026
Updated
15 October 2026
Weakness
CWE-639

Vendor fix

Update to the latest version once a patch is available or implement proper route-level permission and ownership validation.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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