CVE-2026-59221— open-webui terminal proxy path traversal guard bypass via 9x encoded traversal
Possible ATT&CK Techniques 1AI
T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| open-webui | open-webui | >= 0.9.6, < 0.10.0 | affected |
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I. Basic Information for CVE-2026-59221
Vulnerability Information
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Vulnerability Title
open-webui terminal proxy path traversal guard bypass via 9x encoded traversal
Source: CVE Program / CVE List V5
Vulnerability Description
Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.6 before 0.10.0, _sanitize_proxy_path in backend/open_webui/routers/terminals.py decoded proxy paths only eight times, allowing a nine-times percent-encoded ../ traversal value to pass normalization checks and be decoded by the upstream terminal server. This issue is fixed in version 0.10.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
Open WebUI 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Open WebUI是Open WebUI团队开源的一个可扩展、功能丰富、用户友好的自托管 WebUI。 Open WebUI 0.9.6版本至0.10.0之前版本存在安全漏洞，该漏洞源于backend/open_webui/routers/terminals.py文件中的_sanitize_proxy_path函数仅解码代理路径八次，允许九次百分比编码的“../”遍历值通过规范化检查，可能导致路径遍历。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| open-webui | open-webui | >= 0.9.6, < 0.10.0 | - |
II. Public POCs for CVE-2026-59221
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
Qwen3.6-35B-A3B · 6219 chars
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III. Intelligence Information for CVE-2026-59221
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Patches & Fixes for CVE-2026-59221 (2)
Vendor Advisories for CVE-2026-59221 (1)
Vendor Pages for CVE-2026-59221 (1)
Same Patch Batch · open-webui · 2026-07-09 · 17 CVEs total
| CVE-2026-59224 | 8.0 HIGH | Open WebUI: Terminal proxy forwards a spoofable, integrity-unbound user identity to the up |
| CVE-2026-59216 | 7.7 HIGH | Open WebUI: Cross-user code-interpreter and tool execution via unvalidated Socket.IO event |
| CVE-2026-59214 | 7.3 HIGH | Open WebUI: Stored web worker XSS via Pyodide |
| CVE-2026-59219 | 7.1 HIGH | Open WebUI: Realtime endpoints accept Redis-revoked JWTs after signout/backchannel logout |
| CVE-2026-59220 | 6.5 MEDIUM | Open WebUI: ReDoS in skill-mention regexes causes whole-instance DoS on default config |
| CVE-2026-59212 | 5.4 MEDIUM | Open WebUI: Model meta.knowledge read-only file access can be upgraded to file write/delet |
| CVE-2026-59225 | 5.4 MEDIUM | Open WebUI: Arena task endpoints can bypass underlying model access controls |
| CVE-2026-59218 | 5.3 MEDIUM | Open WebUI: Account enumeration via observable login timing discrepancy |
| CVE-2026-59227 | 4.3 MEDIUM | Open WebUI: POST /api/v1/images/edit bypasses the global image-edit switch and the per-use |
| CVE-2026-59217 | 4.3 MEDIUM | Open WebUI: Upload `metadata.knowledge_id` bypasses the knowledge-base write-access check |
| CVE-2026-59223 | 4.3 MEDIUM | Open WebUI: `WEB_FETCH_FILTER_LIST` host allow/block filter bypassable via URL path and no |
| CVE-2026-59213 | 3.5 LOW | Open WebUI: Cross-user model-list exposure via static cache key in get_all_models (aiocach |
| CVE-2026-59226 | 3.1 LOW | Open WebUI: Scheduled automations continue after pending-user deactivation and stored mode |
| CVE-2026-59715 | 3.1 LOW | Open WebUI: Unauthenticated WebSocket Access to Collaborative Document Handlers (ydoc:awar |
| CVE-2026-59215 | 3.1 LOW | Open WebUI: Private channel messages can be disclosed through cross-channel thread parent_ |
| CVE-2026-59222 | Open WebUI: /api/v1/channels/{id}/members exposes full user model including sensitive cred |
IV. Related Vulnerabilities
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Open WebUI: Stored XSS via unescaped KaTeX render-error fall - CVE-2026-70491
Open WebUI: Tool source code disclosed to read-only users vi - CVE-2026-70490
Open WebUI: Unapproved accounts can open terminal sessions v
Same vendor: open-webui
- CVE-2026-70494
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Open WebUI: Stored XSS via unescaped KaTeX render-error fall - CVE-2026-70491
Open WebUI: Tool source code disclosed to read-only users vi - CVE-2026-70490
Open WebUI: Unapproved accounts can open terminal sessions v
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V. Comments for CVE-2026-59221
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