Open WebUI Affected by an External Model Server (Direct Connections) Code Injection via SSE Events
Published Nov 8, 2025
8.0
HIGHCVSS 3.1
EPSS 7.77%
Description
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Versions 0.6.224 and prior contain a code injection vulnerability in the Direct Connections feature that allows malicious external model servers to execute arbitrary JavaScript in victim browsers via Server-Sent Event (SSE) execute events. This leads to authentication token theft, complete account takeover, and when chained with the Functions API, enables remote code execution on the backend server. The attack requires the victim to enable Direct Connections (disabled by default) and add the attacker's malicious model URL, achievable through social engineering of the admin and subsequent users. This issue is fixed in version 0.6.35.
Affected products
-
- Version < 0.6.35StatusaffectedConstraints-
- 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 |
|
- < 0.6.35
No data.
No Red Hat product state for this CVE.
open-webui
npm
Introduced 0 Fixed 0.6.35open-webui
PyPI
Introduced 0 Fixed 0.6.35
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| npm | open-webui | 0 | 0.6.35 |
| PyPI | open-webui | 0 | 0.6.35 |
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:H
1 other source (GHSA) ▾
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 Nov 13, 2025 · 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
2025–2026- 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 | 7.77% (0.07770) | 94.47th | v5 (v2026.06.15) |
| Jun 15, 2026 | 7.60% (0.07602) | 93.75th | v5 (v2026.06.15) |
| Nov 8, 2025 | 0.12% (0.00118) | 31.33th | v4 (v2025.03.14) |
References (4)
- https://github.com/advisories/GHSA-cm35-v4vp-5xvx Advisory
- https://github.com/open-webui/open-webui/commit/8af6a4cf21b756a66cd58378a01c60f74c39b7ca x_refsource_MISCPatch
- https://github.com/open-webui/open-webui/security/advisories/GHSA-cm35-v4vp-5xvx exploitx_refsource_CONFIRMThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2025-64496
| Link | Providers | Tags |
|---|---|---|
| https://github.com/advisories/GHSA-cm35-v4vp-5xvx | Advisory | |
| https://github.com/open-webui/open-webui/commit/8af6a4cf21b756a66cd58378a01c60f74c39b7ca | x_refsource_MISCPatch | |
| https://github.com/open-webui/open-webui/security/advisories/GHSA-cm35-v4vp-5xvx | exploitx_refsource_CONFIRMThird Party Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2025-64496 |
Change history (0)
No recorded changes yet.