6.5

CVE-2026-45351: open-webui

CVSS: 6.5v3.1MediumModified
AliasesGHSA-jh9g-8jqw-m2qxPYSEC-2026-2741
Published 15-05-2026Last modified 18-05-2026
Open JSON

Vulnerability summary

CVE-2026-45351 is a medium (CVSS 6.5) vulnerability in open-webui. EPSS estimates a 0.39% chance of exploitation in the next 30 days, higher than 32% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
36/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.5/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.39%
0%100%
Low · +0.11 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github

Timeline

  1. 15-05-2026
    PublishedVulnerability first disclosed.
  2. 18-05-2026
    Last modifiedVulnerability information updated.

Description

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.8.9, when a regular user [non-admin] logs into the application, a http://IP:8080/api/models? web request is initiated by the application and in response, it reveals the system prompt of available models set by admin on models pages in workspace affecting the confidentiality of application. This vulnerability is fixed in 0.8.9.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.39%

Chance of exploitation in the next 30 days

Percentile

32%

Versus all other CVEs

30-day change

+0.11 pp

From 0.28% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.39%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • githubUnverified

    Open Webui

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Open-webui1 product
Openwebui1 product
PyPI1 product
  • open-webui< 0.8.9

3 vendors · 3 products

References

6 links