CVE-2026-59221Public exploitNetwork attack vector

Authenticated terminal-route access via capped percent-decoding

Published Jul 9, 2026 · Updated Jul 9, 2026

Path traversal in Open WebUI 0.9.6 and later before 0.10.0 allows remote authenticated users to access unintended terminal routes. _sanitize_proxy_path stops after eight percent-decoding passes, normalizes the still-encoded path, and forwards it for upstream decoding. Normal access to an administrator-configured terminal connection is required, and requests carry that terminal's credentials and X-User-Id header.

CVSS severity7.7
High
EPSS probability0.48%
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 0.9.6 and later before 0.10.0 allows remote authenticated users to access unintended terminal routes. _sanitize_proxy_path stops after eight percent-decoding passes, normalizes the still-encoded path, and forwards it for upstream decoding. Normal access to an administrator-configured terminal connection is required, and requests carry that terminal's credentials and X-User-Id header.

The record

CVE
CVE-2026-59221
Published
Jul 9, 2026
Updated
Jul 9, 2026
Vendor
Open WebUI
Product
Open WebUI
Classifications
CWE-918, CWE-22, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 9, 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, < 0.10.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Open WebUI · Open WebUIversion=>= 0.9.6, < 0.10.0

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

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