Open WebUI: Open WebUI Improper Authorization Control

published 2026-05-08 6 mo ago modified 2026-07-13 3 mo ago also GHSA-4vg5-rp28-gvjf , PYSEC-2026-2703 , EUVD-2026-30643

cvss: 7.3; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 13%
public exploits: 0; none known

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.1.124, the API does not properly validate that the user has an authorized user role of user. By default, when Open WebUI is configured with new sign-ups enabled, the default user role is set to pending. In this configuration, an administrator is required to go into the Admin management panel following a new user registration and reconfigure the user to have a role of either user or admin before that user is able to access the web application. This vulnerability is fixed in 0.1.124.

Patch / fix

fixed in 2

pypi open-webui 0.1.124
openwebui open_webui 0.1.124

CISA SSVC

Exploitation: Proof of concept is public
Automatable: yes
Technical impact: partial
Assessed: 5 mo ago (2026-05-18)

Exploit prediction

0.23% chance of exploitation in the next 30 days, higher than 13% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/open-webui/open-webui/security/advisories/GHSA-4vg5-rp28-gvjf referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
OSV	3.1	7.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
GitHub	3.1	7.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Affected packages

ecosystem	package	affected	fixed in
pypi	open-webui	<0.1.124	0.1.124

Affected products

open-webui open-webui

Classification

Weakness

CWE-863 Incorrect Authorization
CWE-602 Client-Side Enforcement of Server-Side Security
CWE-862 Missing Authorization

References

github.com /open-webui/open-webui/security/advisories/GHSA-4vg5-rp28-gvjf
exploit, web, mitigation, vendor-advisory
nvd.nist.gov /vuln/detail/CVE-2026-44567
advisory
github.com /open-webui/open-webui
package
pypi.org /project/open-webui
package
github.com /advisories/GHSA-4vg5-rp28-gvjf
advisory

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary