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CVE-2026-54017— Open WebUI: Path traversal / SSRF in terminal server proxy via encoded path traversal

Quick assessment

Affected
open-webui open-webui
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

open-webui open-webui是open-webui的机器学习领域中用于人工智能相关应用的用户界面。 open-webui 0.9.6之前版本存在安全漏洞，该漏洞源于终端服务器反向代理未完全限制用户控制的path段，可能导致路径遍历和服务端请求伪造攻击。

CVSS 7.7 · High EPSS 0.52% · P42

Affected Version Matrix 1

VendorProduct Version RangeStatus
open-webui open-webui < 0.9.6 affected
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I. Basic Information for CVE-2026-54017

Vulnerability Information
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Vulnerability Title
Open WebUI: Path traversal / SSRF in terminal server proxy via encoded path traversal
Source: CVE Program / CVE List V5
Vulnerability Description
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.6, the terminal-server reverse proxy in `backend/open_webui/routers/terminals.py` does not fully confine the user-controlled `path` segment before forwarding it to an admin-configured terminal server. An authenticated user who has been granted access to a terminal server can craft `path` values containing encoded `../` traversal sequences that escape the intended path (or policy) scope on that server, reaching unintended endpoints and files on the terminal-server host. Where the terminal server fans requests out to internal services, this also gives SSRF-style reach into those services. This is a separate code path from the `/api/v1/retrieval/process/web` SSRF (GHSA-c6xv-rcvw-v685), with its own input. Two distinct vectors are consolidated here: first, raw path forwarding / single-encoded traversal (original report); and second, a bypass of the subsequently-added `_sanitize_proxy_path` mitigation using double-encoded dots (`%252e%252e`). The attacker-controlled input is the request `path`, supplied by the non-admin user, not anything an administrator configures, so this is not an admin-trust / Rule-9 situation. Version 0.9.6 fixes the issue.
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 open-webui是open-webui的机器学习领域中用于人工智能相关应用的用户界面。 open-webui 0.9.6之前版本存在安全漏洞，该漏洞源于终端服务器反向代理未完全限制用户控制的path段，可能导致路径遍历和服务端请求伪造攻击。
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 -

II. Public POCs for CVE-2026-54017

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 8776 chars
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III. Intelligence Information for CVE-2026-54017

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Vendor Advisories for CVE-2026-54017 (1)

IV. Related Vulnerabilities

Same product: open-webui
Same vendor: open-webui
Same weakness: CWE-22

V. Comments for CVE-2026-54017

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