CVE-2026-44566Public exploitNetwork attack vector

Authenticated arbitrary file write via unsanitized upload filename

Published May 15, 2026 · Updated May 15, 2026

Path traversal in Open WebUI before 0.1.124 allows remote authenticated users to write files outside the upload directory. The /rag/api/v1/doc handler joins the multipart filename directly to UPLOAD_DIR and writes the body without rejecting dot-segments. A valid session token and server-process write permission are required; exploitation can replace authorized_keys or plant a malicious model anywhere that process can write.

CVSS severity7.3
High
EPSS probability0.34%
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 0.1.124 allows remote authenticated users to write files outside the upload directory. The /rag/api/v1/doc handler joins the multipart filename directly to UPLOAD_DIR and writes the body without rejecting dot-segments. A valid session token and server-process write permission are required; exploitation can replace authorized_keys or plant a malicious model anywhere that process can write.

The record

CVE
CVE-2026-44566
Published
May 15, 2026
Updated
May 15, 2026
Vendor
Open WebUI
Product
Open WebUI
Classifications
CWE-22, CWE-434, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 15, 2026CVE publishedPublication date reported by the CVE source.
  2. May 15, 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=< 0.1.124

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Open WebUI · Open WebUIversion=< 0.1.124

Published CVSS scores

7.3GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

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.

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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-434Unrestricted Upload of File with Dangerous Type
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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