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CVE-2026-54018

Openwebui Open Webui server-side request forgery (SSRF)

7.7 HIGHPublic exploitEPSS 0.39%
  1. Published23 Jun 2026

Description

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.6, the SafePlaywrightURLLoader implements a validate_url function to prevent SSRF attacks by checking the IP address of the user-provided URL. However, this validation is performed only on the initial URL. Since Playwright automatically follows HTTP redirects (301/302) by default, an attacker can bypass the validation by providing a safe URL that redirects to a restricted internal network address (e.g., localhost, Docker container network, or Cloud Metadata). This allows the application to access internal services despite ENABLE_RAG_LOCAL_WEB_FETCH being set to False This vulnerability is fixed in 0.9.6.

CVSS 3.1 breakdown

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

Affected products

Openwebui Open Webui< 0.9.6

Remediation

Fixed in
Openwebui Open Webui≥ 0.9.6

References

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Frequently asked

Is CVE-2026-54018 being actively exploited?

CVE-2026-54018 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.39%.

How severe is CVE-2026-54018?

CVE-2026-54018 has a CVSS 3.1 base score of 7.7, rated high. EPSS estimates a 0.39% probability of exploitation.

Which products are affected by CVE-2026-54018?

Affected products include Openwebui Open Webui.

How do I fix CVE-2026-54018?

Upgrade affected software to a fixed version, for example Openwebui Open Webui 0.9.6 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-54018 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.