CVE-2026-109291— Open WebUI 0.6.33 before 0.11.4 Stored XSS via Citation embed_url
Quick assessment
Affected
open-webui open-webui
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Open WebUI 版本从 0.6.33 到 0.11.4（不含）存在一个跨站脚本（XSS）漏洞，该漏洞允许经过身份验证的用户通过在“引用”（citation）的 字段中存储 协议的 URL，在受害者的会话中执行恶意脚本。攻击者可以共享一个构造好的聊天内容，当受害者点击其中的引用时，该引用会被传递给 方法，从而使攻击者能够窃取 ，并冒充受害者进行操作。
Possible ATT&CK Techniques 2 AI
T1059 · Command and Scripting Interpreter T1530 · Data from Cloud StorageAffected Version Matrix 2
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| open-webui | open-webui | 0.6.33< 0.11.4 |
affected |
0.11.4 |
unaffected |
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I. Basic Information for CVE-2026-109291
Vulnerability Information
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Vulnerability Title
Open WebUI 0.6.33 before 0.11.4 Stored XSS via Citation embed_url
Source: CVE Program / CVE List V5
Vulnerability Description
Open WebUI from 0.6.33 before 0.11.4 contains a cross-site scripting vulnerability that allows authenticated users to execute script in victims' sessions by storing javascript: URLs in citation embed_url fields. Attackers can share a crafted chat whose citation, when clicked, is passed to window.open, letting them steal localStorage.token and act as the victim.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| open-webui | open-webui | 0.6.33 ~ 0.11.4 | - |
|
II. Public POCs for CVE-2026-109291
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Vendor Advisories for CVE-2026-109291 (2)
Same Patch Batch · open-webui · 2026-10-12 · 19 CVEs total
| CVE-2026-109286 | 8.1 HIGH | Open WebUI 0.7.0 before 0.11.4 Session Token Theft via SyncStatsModal |
| CVE-2026-109572 | 7.6 HIGH | Open WebUI 0.8.6 before 0.11.4 Privilege Escalation via Terminal Proxy |
| CVE-2026-109290 | 7.3 HIGH | Open WebUI 0.11.1 before 0.11.4 Stored XSS via DOCX Preview |
| CVE-2026-109292 | 6.8 MEDIUM | Open WebUI 0.6.27 before 0.11.4 Session Token Disclosure via OAuth-Mode Connections |
| CVE-2026-109299 | 6.5 MEDIUM | Open WebUI 0.9.0 before 0.11.4 Denial of Service via Recurrence Rule Validation |
| CVE-2026-109295 | 6.5 MEDIUM | Open WebUI 0.11.0 before 0.11.4 ReDoS via grep_knowledge_files Event Loop |
| CVE-2026-109298 | 6.5 MEDIUM | Open WebUI 0.11.0 before 0.11.4 Memory Exhaustion via Knowledge Search Regex |
| CVE-2026-109297 | 6.5 MEDIUM | Open WebUI 0.11.0 before 0.11.4 Denial of Service via Automation Recurrence Rules |
| CVE-2026-109293 | 6.5 MEDIUM | Open WebUI 0.11.0 before 0.11.4 Tool Source Disclosure via Tool Export Endpoint |
| CVE-2026-109294 | 6.5 MEDIUM | Open WebUI 0.6.42 before 0.11.4 Memory Exhaustion via Compressed Remote Image |
| CVE-2026-109288 | 6.4 MEDIUM | Open WebUI before 0.11.4 Stored XSS via javascript: URLs in Markdown Links |
| CVE-2026-109289 | 6.3 MEDIUM | Open WebUI 0.8.8 before 0.11.4 Improper Session Revocation via Terminal WebSocket |
| CVE-2026-109283 | 5.4 MEDIUM | Open WebUI 0.11.1 before 0.11.4 Authorization Bypass via OAuth Token Exchange |
| CVE-2026-109285 | 5.0 MEDIUM | Open WebUI 0.6.0 before 0.11.4 Improper Access Control via Stale File Metadata |
| CVE-2026-109300 | 4.6 MEDIUM | Open WebUI 0.6.31 before 0.11.4 Stored XSS via Tool-Call Embeds |
| CVE-2026-109296 | 4.3 MEDIUM | Open WebUI before 0.11.4 Missing Authorization via Backend Index on Model Routes |
| CVE-2026-109284 | 4.3 MEDIUM | Open WebUI 0.11.0 before 0.11.4 Improper Authorization via Chat Fork Endpoint |
| CVE-2026-109287 | 4.3 MEDIUM | Open WebUI 0.9.6 before 0.11.4 Information Disclosure via Unscoped Directory ID |
IV. Related Vulnerabilities
Same product: open-webui
-
CVE-2026-109572
Open WebUI 0.8.6 before 0.11.4 Privilege Escalation via Term -
CVE-2026-109300
Open WebUI 0.6.31 before 0.11.4 Stored XSS via Tool-Call Emb -
CVE-2026-109299
Open WebUI 0.9.0 before 0.11.4 Denial of Service via Recurre -
CVE-2026-109298
Open WebUI 0.11.0 before 0.11.4 Memory Exhaustion via Knowle -
CVE-2026-109297
Open WebUI 0.11.0 before 0.11.4 Denial of Service via Automa
Same vendor: open-webui
-
CVE-2026-109572
Open WebUI 0.8.6 before 0.11.4 Privilege Escalation via Term -
CVE-2026-109300
Open WebUI 0.6.31 before 0.11.4 Stored XSS via Tool-Call Emb -
CVE-2026-109299
Open WebUI 0.9.0 before 0.11.4 Denial of Service via Recurre -
CVE-2026-109298
Open WebUI 0.11.0 before 0.11.4 Memory Exhaustion via Knowle -
CVE-2026-109297
Open WebUI 0.11.0 before 0.11.4 Denial of Service via Automa
Same weakness: CWE-79
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CVE-2026-100186
User Profile Builder <= 4.0.3 - Unauthenticated Stored Cross -
CVE-2026-88963
Tutor LMS <= 4.0.8 - Authenticated (Subscriber+) Reflected D -
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NotificationX <= 3.3.3 - Unauthenticated Stored Cross-Site S -
CVE-2026-111122
SiteOrigin CSS <= 1.6.7 - Unauthenticated Stored DOM-Based C -
CVE-2026-107764
SiteOrigin CSS <= 1.6.7 - Unauthenticated Stored DOM-Based C
V. Comments for CVE-2026-109291
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