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CVE-2026-54009

CVE-2026-54009 · Open WebUI: Cross-user file disclosure via /api/chat/completions image_url field

This page contains facts from public vulnerability sources. Check the original advisory before updating.

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.6, POST /api/chat/completions accepts an image_url.url value that, when it does NOT start with http://, https://, or data:image/, is interpreted as a file id and resolved against the global file table with no ownership check. an authenticated user can therefore set image_url.url to another user's file id, the server reads that file from disk, base64-encodes it, and injects the data URI into the LLM request. the user then prompts the LLM to describe / OCR the file and reads the content back. This vulnerability is fixed in 0.9.6.

CVSS 6.5 · Medium · EPSS 0.4% · Fix available

Published
Updated

Stack: python

Affected products and versions

  • open-webui

    Versions
    • < 0.9.6: Affected

    No fix published

  • open-webui PyPI

    Versions
    • 0.1.124
    • 0.1.125
    • 0.2.0
    • 0.2.1
    • 0.2.2
    • 0.2.3
    • 0.2.4
    • 0.2.5
    • 0.3.0
    • 0.3.1
    • 0.3.10
    • 0.3.12
    • 0.3.13
    • 0.3.14
    • 0.3.15
    • 0.3.16
    • 0.3.17
    • 0.3.17.dev2
    • 0.3.17.dev3
    • 0.3.17.dev4
    • 0.3.17.dev5
    • 0.3.18
    • 0.3.19
    • 0.3.2
    • 0.3.20
    • 0.3.21
    • 0.3.22
    • 0.3.23
    • 0.3.24
    • 0.3.25
    • 0.3.26
    • 0.3.27
    • 0.3.27.dev1
    • 0.3.27.dev2
    • 0.3.27.dev3
    • 0.3.28
    • 0.3.29
    • 0.3.3
    • 0.3.30
    • 0.3.30.dev1
    • 0.3.30.dev2
    • 0.3.31
    • 0.3.31.dev1
    • 0.3.32
    • 0.3.33
    • 0.3.33.dev1
    • 0.3.34
    • 0.3.35
    • 0.3.4
    • 0.3.5
    • 0.3.6
    • 0.3.7
    • 0.3.8
    • 0.3.9
    • 0.4.0
    • 0.4.0.dev1
    • 0.4.0.dev2
    • 0.4.1
    • 0.4.2
    • 0.4.3
    • 0.4.4
    • 0.4.5
    • 0.4.6
    • 0.4.6.dev1
    • 0.4.7
    • 0.4.8
    • 0.5.0
    • 0.5.0.dev1
    • 0.5.0.dev2
    • 0.5.1
    • 0.5.10
    • 0.5.11
    • 0.5.12
    • 0.5.13
    • 0.5.14
    • 0.5.15
    • 0.5.16
    • 0.5.17
    • 0.5.18
    • 0.5.19
    • 0.5.2
    • 0.5.20
    • 0.5.3
    • 0.5.3.dev1
    • 0.5.4
    • 0.5.5
    • 0.5.6
    • 0.5.7
    • 0.5.8
    • 0.5.9
    • 0.6.0
    • 0.6.1
    • 0.6.10
    • 0.6.11
    • 0.6.12
    • 0.6.13
    • 0.6.14
    • 0.6.15
    • 0.6.16
    • 0.6.18
    • 0.6.19
    • 0.6.2
    • 0.6.20
    • 0.6.21
    • 0.6.22
    • 0.6.23
    • 0.6.24
    • 0.6.25
    • 0.6.26
    • 0.6.26.dev1
    • 0.6.27
    • 0.6.28
    • 0.6.29
    • 0.6.3
    • 0.6.30
    • 0.6.31
    • 0.6.32
    • 0.6.33
    • 0.6.34
    • 0.6.35
    • 0.6.36
    • 0.6.37
    • 0.6.38
    • 0.6.39
    • 0.6.4
    • 0.6.40
    • 0.6.41
    • 0.6.42
    • 0.6.43
    • 0.6.5
    • 0.6.6
    • 0.6.6.dev1
    • 0.6.7
    • 0.6.8
    • 0.6.9
    • 0.7.0
    • 0.7.1
    • 0.7.2
    • 0.8.0
    • 0.8.1
    • 0.8.10
    • 0.8.11
    • 0.8.12
    • 0.8.2
    • 0.8.3
    • 0.8.4
    • 0.8.5
    • 0.8.6
    • 0.8.7
    • 0.8.8
    • 0.8.9
    • 0.9.0
    • 0.9.1
    • 0.9.2
    • 0.9.3
    • 0.9.4
    • 0.9.5
    Affected ranges
    • ECOSYSTEM: < 0.9.6

    Update to 0.9.6

Original sources

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