CVE-2026-30820Public exploitNetwork attack vector

Authenticated privilege escalation via spoofed internal header

Published Mar 7, 2026 · Updated Mar 7, 2026

Incorrect authorization in Flowise before 3.0.13 allows remote authenticated users to access internal administration APIs via HTTP. The global /api/v1 middleware treats a client-supplied x-request-from: internal header as proof of an internal request and checks only the tenant session cookie. Any low-privilege tenant with a valid browser session can create API keys, read stored credentials, and invoke custom-function endpoints.

CVSS severity8.7
High
EPSS probability0.48%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect authorization in Flowise before 3.0.13 allows remote authenticated users to access internal administration APIs via HTTP. The global /api/v1 middleware treats a client-supplied x-request-from: internal header as proof of an internal request and checks only the tenant session cookie. Any low-privilege tenant with a valid browser session can create API keys, read stored credentials, and invoke custom-function endpoints.

The record

CVE
CVE-2026-30820
Published
Mar 7, 2026
Updated
Mar 7, 2026
Vendor
FlowiseAI
Product
Flowise
Classifications
CWE-863, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 7, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 7, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 3.0.13

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

FlowiseAI · Flowiseversion=< 3.0.13

Published CVSS scores

8.8NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.7GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-863Incorrect Authorization
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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