🛡️ CVE-2026-45399
🟠 CVSS 8.0 — High ✅ No Known Exploit CWE-862 NVD
8.0
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, any authenticated user with low privileges can enumerate active background tasks across the system and stop tasks belonging to other users via the GET /api/tasks and POST /api/tasks/stop/{task_id} methods. This allows a casual user to disrupt system-wide chat usage by continuously canceling other users' active tasks. This is a real authorization vulnerability affecting integrity and usability in multi-user deployments. This vulnerability is fixed in 0.9.0.

Details

Severity HIGH
CVSS Score 8.0
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H
CWE CWE-862
Public Exploit ✅ No
Source NVD
Published 2026-05-14
Updated 2026-06-15
Modified 2026-05-16
Fix URL N/A

Affected Packages

Software From version Fixed in
open-webui 0.9.0
unknown

Similar Threats

Site Security Check

Concerned your site may already be targeted?

BotEraser analyzes incoming traffic patterns and helps identify bot behavior consistent with known exploit attempts.

Check My Site Free →

No credit card required  ·  Results in minutes

ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.