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CVE-2026-30820

Flowiseai Flowise broken access control

8.8 HIGHPublic exploitEPSS 0.65%
  1. Published7 Mar 2026

Description

Flowise is a drag & drop user interface to build a customized large language model flow. Prior to version 3.0.13, Flowise trusts any HTTP client that sets the header x-request-from: internal, allowing an authenticated tenant session to bypass all /api/v1/** authorization checks. With only a browser cookie, a low-privilege tenant can invoke internal administration endpoints (API key management, credential stores, custom function execution, etc.), effectively escalating privilege. This issue has been patched in version 3.0.13.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

Flowiseai Flowise< 3.0.13

Remediation

Fixed in
Flowiseai Flowise≥ 3.0.13

References

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Frequently asked

Is CVE-2026-30820 being actively exploited?

CVE-2026-30820 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.65%.

How severe is CVE-2026-30820?

CVE-2026-30820 has a CVSS 3.1 base score of 8.8, rated high. EPSS estimates a 0.65% probability of exploitation.

Which products are affected by CVE-2026-30820?

Affected products include Flowiseai Flowise.

How do I fix CVE-2026-30820?

Upgrade affected software to a fixed version, for example Flowiseai Flowise 3.0.13 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-30820 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.