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CVE-2026-90533— Flowise before 3.1.4 Broken Access Control via organizationuser

Quick assessment

Affected
FlowiseAI Flowise
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Flowise 3.1.4 之前的版本在 接口中存在访问控制失效漏洞。该漏洞允许任何已认证的组织成员通过传入任意用户 ID 查询该接口，从而获取组织所有者的完整用户记录，包括其 bcrypt 密码哈希值以及临时令牌。攻击者可以提取所有者的高特权账户凭据哈希值，并对其进行离线破解，最终实现对该最高权限账户的接管（账号劫持）。

CVSS 6.0 · Medium
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I. Basic Information for CVE-2026-90533

Vulnerability Information
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Vulnerability Title
Flowise before 3.1.4 Broken Access Control via organizationuser
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
FlowiseAI Flowise 0 ~ 3.1.4 -

II. Public POCs for CVE-2026-90533

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III. Intelligence Information for CVE-2026-90533

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Vendor Advisories for CVE-2026-90533 (2)

Same Patch Batch · FlowiseAI · 2026-09-12 · 3 CVEs total

CVE-2026-90535 6.3 MEDIUM Flowise before 3.1.4 Denial of Service via text-to-speech/abort
CVE-2026-90534 6.1 MEDIUM Flowise before 3.1.4 Cross-Workspace Credential IDOR via node-load-method

IV. Related Vulnerabilities

Same product: Flowise
Same vendor: FlowiseAI
Same weakness: CWE-862

V. Comments for CVE-2026-90533

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