CVE-2026-59714— Open WebUI: Cross-channel message overwrite via chat completion API (single-model and multimodel message_ids)
Possible ATT&CK Techniques 1AI
T1136 · Create AccountAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| open-webui | open-webui | >= 0.9.5, < 0.10.0 | affected |
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I. Basic Information for CVE-2026-59714
Vulnerability Information
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Vulnerability Title
Open WebUI: Cross-channel message overwrite via chat completion API (single-model and multimodel message_ids)
Source: CVE Program / CVE List V5
Vulnerability Description
Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.5 before 0.10.0, any authenticated user can overwrite the content of a message in a channel they do not belong to (including private and DM channels) by sending a chat completion request with a channel:-prefixed chat_id and a target message_id. The channel: path routes pipeline output through _make_channel_emitter, which writes to the Messages table using the caller-supplied message_id without binding it to the channel. This issue is fixed in version 0.10.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| open-webui | open-webui | >= 0.9.5, < 0.10.0 | - |
II. Public POCs for CVE-2026-59714
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
Qwen3.6-35B-A3B · 5751 chars
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III. Intelligence Information for CVE-2026-59714
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Patches & Fixes for CVE-2026-59714 (2)
Vendor Advisories for CVE-2026-59714 (1)
Vendor Pages for CVE-2026-59714 (1)
IV. Related Vulnerabilities
Same product: open-webui
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Open WebUI: Stored XSS via unescaped KaTeX render-error fall - CVE-2026-70491
Open WebUI: Tool source code disclosed to read-only users vi - CVE-2026-70490
Open WebUI: Unapproved accounts can open terminal sessions v
Same vendor: open-webui
- CVE-2026-70494
Open WebUI: A folder write-collaborator can permanently dele - CVE-2026-70493
Open WebUI: Any authenticated user can stall a worker via a - CVE-2026-70492
Open WebUI: Stored XSS via unescaped KaTeX render-error fall - CVE-2026-70491
Open WebUI: Tool source code disclosed to read-only users vi - CVE-2026-70490
Open WebUI: Unapproved accounts can open terminal sessions v
Same weakness: CWE-862
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V. Comments for CVE-2026-59714
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