Open WebUI: Stored XSS via Model Description
Published May 15, 2026
7.3
HIGHCVSS 3.1
EPSS 0.37%
Description
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, a stored cross-site scripting (XSS) vulnerability that allows any authenticated user with model creation permission (workspace.models) to execute arbitrary JavaScript in the browser of any other user (including admins) who views the malicious model in the chat UI. This vulnerability is fixed in 0.9.0.
Affected products
-
- Version < 0.9.0StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Open-Webui | Open-Webui | n/a |
|
- < 0.9.0
No data.
No Red Hat product state for this CVE.
open-webui
npm
Introduced 0 Fixed 0.9.0open-webui
PyPI
Introduced 0 Fixed 0.9.0
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| npm | open-webui | 0 | 0.9.0 |
| PyPI | open-webui | 0 | 0.9.0 |
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
PoCAutomatable
NoTechnical Impact
TotalDecision
n/aAssessed May 19, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
May–Oct 2026- EPSS v4
- EPSS v5
Percentile over time
- EPSS v4
- EPSS v5
Table of values (3 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.37% (0.00372) | 28.79th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.31% (0.00308) | 22.17th | v5 (v2026.06.15) |
| May 16, 2026 | 0.03% (0.00032) | 9.57th | v4 (v2025.03.14) |
References (3)
- https://github.com/advisories/GHSA-gf5m-wcrh-7928 Advisory
- https://github.com/open-webui/open-webui/security/advisories/GHSA-gf5m-wcrh-7928 exploitx_refsource_CONFIRMMitigationVendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-44721
| Link | Providers | Tags |
|---|---|---|
| https://github.com/advisories/GHSA-gf5m-wcrh-7928 | Advisory | |
| https://github.com/open-webui/open-webui/security/advisories/GHSA-gf5m-wcrh-7928 | exploitx_refsource_CONFIRMMitigationVendor Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2026-44721 |
Change history (0)
No recorded changes yet.