High severity · published Sep 26, 2026
CVE-2026-100605
Flowise through 3.1.4 Missing Authorization via Chat Message Routes
7.1
CVSS
0.3%
EPSS
No
On KEV
Description
Flowise through 3.1.4 contains missing route-level RBAC checks on chat message endpoints that allow low-privileged API keys to read and delete chat history. Attackers with valid but low-privileged API keys can access GET and DELETE chat message routes without required flow permissions to read chat histories, prompts, model responses, and delete messages.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
High
Privileges
Low
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 20% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FL
Flowise · FlowiseAI
through 3.1.4 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-100605
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-100605
vendor-advisory
https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-ppmg-4cx6-95hh
third-party-advisory
https://www.vulncheck.com/advisories/flowise-through-3.1.4-missing-authorization-via-chat-message-routes
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