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CVE-2026-33484

Langflow broken access control

7.5 HIGHPublic exploitEPSS 0.56%
  1. Published24 Mar 2026

Description

Langflow is a tool for building and deploying AI-powered agents and workflows. In versions 1.0.0 through 1.8.1, the `/api/v1/files/images/{flow_id}/{file_name}` endpoint serves image files without any authentication or ownership check. Any unauthenticated request with a known flow_id and file_name returns the image with HTTP 200. In a multi-tenant deployment, any attacker who can discover or guess a `flow_id` (UUIDs can be leaked through other API responses) can download any user's uploaded images without credentials. Version 1.9.0 contains a patch.

CVSS 3.1 breakdown

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

Affected products

Langflow≥ 1.0.0 < 1.9.0

Remediation

Fixed in
Langflow≥ 1.9.0

References

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Frequently asked

Is CVE-2026-33484 being actively exploited?

CVE-2026-33484 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.56%.

How severe is CVE-2026-33484?

CVE-2026-33484 has a CVSS 3.1 base score of 7.5, rated high. EPSS estimates a 0.56% probability of exploitation.

Which products are affected by CVE-2026-33484?

Affected products include Langflow.

How do I fix CVE-2026-33484?

Upgrade affected software to a fixed version, for example Langflow 1.9.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-33484 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.