CVE-2026-90533
Flowise before 3.1.4 Broken Access Control via organizationuser
Description
Flowise before 3.1.4 contains a broken access control vulnerability in GET /api/v1/organizationuser that allows any authenticated organization member to retrieve the organization owner's full user record including bcrypt password hash and temporary tokens. Attackers can query the endpoint with any user ID to obtain the owner's credential hash for offline cracking, enabling account takeover of the highest-privileged account.
INFO
Published Date :
Sept. 12, 2026, 1:16 p.m.
Last Modified :
Sept. 15, 2026, 6:23 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 4.0 | MEDIUM | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 4.0 | MEDIUM | [email protected] |
Solution
- Update Flowise to version 3.1.4 or later.
- Apply security patches provided by the vendor.
- Restrict access to sensitive API endpoints.
- Review user roles and permissions.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-90533.
| URL | Resource |
|---|---|
| https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-fhxm-xxcx-g6x3 | Exploit Vendor Advisory |
| https://www.vulncheck.com/advisories/flowise-before-3.1.4-broken-access-control-via-organizationuser | Third Party Advisory |
| https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-fhxm-xxcx-g6x3 | Exploit Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-90533 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-90533
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-90533 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-90533 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Sep. 15, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N Added CPE Configuration OR *cpe:2.3:a:flowiseai:flowise:*:*:*:*:*:*:*:* versions up to (excluding) 3.1.4 Added Reference Type VulnCheck: https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-fhxm-xxcx-g6x3 Types: Exploit, Vendor Advisory Added Reference Type VulnCheck: https://www.vulncheck.com/advisories/flowise-before-3.1.4-broken-access-control-via-organizationuser Types: Third Party Advisory Added Reference Type CISA-ADP: https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-fhxm-xxcx-g6x3 Types: Exploit, Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Sep. 14, 2026
Action Type Old Value New Value Added Reference https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-fhxm-xxcx-g6x3 Added SSVC {'id': 'CVE-2026-90533', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-09-14T18:29:01.223297Z'} -
New CVE Received by [email protected]
Sep. 12, 2026
Action Type Old Value New Value Added Description Flowise before 3.1.4 contains a broken access control vulnerability in GET /api/v1/organizationuser that allows any authenticated organization member to retrieve the organization owner's full user record including bcrypt password hash and temporary tokens. Attackers can query the endpoint with any user ID to obtain the owner's credential hash for offline cracking, enabling account takeover of the highest-privileged account. Added CVSS V4.0 AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/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 Added CWE CWE-862 Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/90xxx/CVE-2026-90533.json">CVE-2026-90533</a> Added Reference https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-fhxm-xxcx-g6x3 Added Reference https://www.vulncheck.com/advisories/flowise-before-3.1.4-broken-access-control-via-organizationuser