EUVD-2026-7981
GHSA-vjm7-m4xh-7wrc
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
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AccessAuthenticate to Open WebUI
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DeliveryManually modify chat history to inject malicious embeds
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ExploitCraft iframe sandbox bypass payload
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ExecutionTrigger stored XSS when chat renders
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ImpactExecute JavaScript in victim context
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization Output encoding, context-aware escaping
MITRE ATT&CK
2 techniques across 2 tactics: Initial Access, Execution The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Exploitation Conditions | Authenticated user account required on Open WebUI prior to version 0.6.44. Victim must view chat message containing malicious embeds property. Iframe sandbox configured with allow-scripts and allow-same-origin flags, bypassing intended sandbox restrictions. |
| Impact | CVSS 7.3 (HIGH). Attack vector: Network. Complexity: Low. Privileges required: Low. User interaction: Required. Public exploit/POC available. |
| Exploit ScenarioDerived | An attacker could exploit this vulnerability to compromise the affected system. |
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Alert meAnalysisAIv1 – Mar 12, 2026
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. [CVSS 7.3 HIGH]
RemediationAI
Monitor vendor advisories for a patch. Implement output encoding and Content Security Policy headers. Restrict network access to the affected service where possible.
Affected VersionsENISA
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 1 package in pypi
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
Classified as CWE-79 (Cross-site Scripting (XSS)). Affects Open Webui. Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to version 0.6.44, aanually modifying chat history allows setting the embeds property on a response message, the content of which is loaded into an iFrame with a sandbox that has allow-scripts and allow-same-origin set, ignoring the "iframe Sandbox Allow Same Origin" configuration. This enables stored XSS on the affected chat. This also triggers when the chat is in the shared format. Th
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Severity by source
AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
Primary rating from GitHub Advisory · only source for this CVE.
CVSS VectorGitHub Advisory
Lifecycle Timeline
3DescriptionGitHub Advisory
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to version 0.6.44, aanually modifying chat history allows setting the embeds property on a response message, the content of which is loaded into an iFrame with a sandbox that has allow-scripts and allow-same-origin set, ignoring the "iframe Sandbox Allow Same Origin" configuration. This enables stored XSS on the affected chat. This also triggers when the chat is in the shared format. The result is a shareable link containing the payload that can be distributed to any other users on the instance. Version 0.6.44 fixes the issue.
Executive ViewAI
CVE-2026-26193 is a high-severity vulnerability affecting Open WebUI deployments that could allow unauthorized access or data compromise on self-hosted AI platforms. Organizations running Open WebUI must immediately assess exposure and implement interim protections, as no vendor patch is currently available and public exploits exist.
Implement network-level access controls and restrict Open WebUI to trusted networks only; Deploy Web Application Firewall (WAF) rules to detect and block exploitation attempts; Disable unnecessary Open WebUI features or API endpoints; Enable comprehensive logging and monitoring for suspicious activity; Require multi-factor authentication for all platform access; Run Open WebUI in an isolated environment with minimal data access; Monitor vendor advisories daily for patch availability.
Threat Intelligence Overview
NVD
CVE.org
EPSS
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Cross-Site Scripting occurs when an application accepts untrusted data and sends it to a web browser without proper validation or encoding.
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