CVE-2026-54017Public exploitNetwork attack vector

Authenticated internal access via encoded proxy traversal

Published Jun 18, 2026 · Updated Jun 18, 2026

Path traversal in Open WebUI before 0.9.6 allows remote authenticated users to access unintended terminal-server files and endpoints. The terminal proxy decodes the user-controlled path only once before normalization, allowing double-encoded dot segments to survive validation and be decoded upstream. Access requires a non-admin account granted use of a configured terminal server; successful requests expose unintended files, policy namespaces, or routed internal services.

CVSS severity7.7
High
EPSS probability0.52%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in Open WebUI before 0.9.6 allows remote authenticated users to access unintended terminal-server files and endpoints. The terminal proxy decodes the user-controlled path only once before normalization, allowing double-encoded dot segments to survive validation and be decoded upstream. Access requires a non-admin account granted use of a configured terminal server; successful requests expose unintended files, policy namespaces, or routed internal services.

The record

CVE
CVE-2026-54017
Published
Jun 18, 2026
Updated
Jun 18, 2026
Vendor
Open WebUI
Product
Open WebUI
Classifications
CWE-22, CWE-918, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 18, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 0.9.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Open WebUI · Open WebUIversion=< 0.9.6

Published CVSS scores

7.7GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CWE-918Server-Side Request Forgery (SSRF)
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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