Is this vulnerability remotely exploitable over the internet?

Yes, if the Flowise instance is exposed over a network reachable by tenants. Any authenticated tenant who can send HTTP requests and set the `x-request-from` header can potentially exploit the issue, assuming no additional network-level protections are in place.

Does exploitation require administrator or elevated access?

No. A low-privilege tenant account with a valid session cookie is sufficient, because the privilege escalation occurs when the server incorrectly trusts the `x-request-from: internal` header rather than enforcing proper role-based checks.

What is the safest general fix pattern?

Replace header-based trust with explicit, server-side authorization for every sensitive endpoint. Administrative APIs should require specific roles or permissions, and any notion of "internal" access should be enforced via network boundaries and authenticated service identities, not via client-modifiable headers.

Severity:

HIGH RISK

(8.8)

Authorization Bypass via Trusting Request Headers (CWE-863) in Flowise Admin APIs

CVE-2026-30820

Published:

Mar 6, 2026

Status:

Analyzed

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

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HIGH RISK

HIGH

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Privilege Escalation via Bypassed Access Control

May 6, 2026

Vulnerability Type

Category:

Authorization Bypass

CWE:

CWE-863

Impact:

Privilege Escalation and Unauthorized Administrative Actions

Severity:

HIGH RISK

(8.8)

CVSS Version:

3.1

Vulnerability Type

Category:

Authorization Bypass

CWE:

CWE-863

Impact:

Privilege Escalation and Unauthorized Administrative Actions

Severity:

HIGH RISK

(8.8)

CVSS Version:

3.1

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Authorization Bypass via Trusting Request Headers (CWE-863) in Flowise Admin APIs

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

HIGH RISK

HIGH

(8.6)

Server-Side Request Forgery (CWE-918) in OpenClaw Zalo Plugin sendPhoto

HIGH RISK

HIGH

(8.8)

Authorization Bypass (CWE-863) in OpenClaw Matrix Room Control Commands

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

Ship clean & secure code faster

Ship clean & secure code faster

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