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CVE-2026-59215— Open WebUI: Private channel messages can be disclosed through cross-channel thread parent_id binding

Quick assessment

Affected
open-webui open-webui
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Open WebUI是Open WebUI团队开源的一个可扩展、功能丰富、用户友好的自托管 WebUI。 Open WebUI 0.10.0之前版本存在授权问题漏洞，该漏洞源于通道讨论线程父级和回复处理未将parent_id绑定到URL中的通道，可能导致经过身份验证的用户引用另一个私人或DM通道的消息并跨通道泄露线程上下文。

CVSS 3.1 · Low EPSS 0.32% · P23

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage

Affected Version Matrix 1

VendorProduct Version RangeStatus
open-webui open-webui < 0.10.0 affected
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I. Basic Information for CVE-2026-59215

Vulnerability Information
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Vulnerability Title
Open WebUI: Private channel messages can be disclosed through cross-channel thread parent_id binding
Source: CVE Program / CVE List V5
Vulnerability Description
Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. Prior to 0.10.0, channel thread parent and reply handling did not bind parent_id to the channel in the URL, allowing an authenticated user to reference a message from another private or DM channel and disclose thread context across channels. This issue is fixed in version 0.10.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5
Vulnerability Title
Open WebUI 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Open WebUI是Open WebUI团队开源的一个可扩展、功能丰富、用户友好的自托管 WebUI。 Open WebUI 0.10.0之前版本存在授权问题漏洞，该漏洞源于通道讨论线程父级和回复处理未将parent_id绑定到URL中的通道，可能导致经过身份验证的用户引用另一个私人或DM通道的消息并跨通道泄露线程上下文。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
open-webui open-webui < 0.10.0 -

II. Public POCs for CVE-2026-59215

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III. Intelligence Information for CVE-2026-59215

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Patches & Fixes for CVE-2026-59215 (2)

Vendor Advisories for CVE-2026-59215 (1)

Vendor Pages for CVE-2026-59215 (1)

Same Patch Batch · open-webui · 2026-07-09 · 17 CVEs total

CVE-2026-59224 8.0 HIGH Open WebUI: Terminal proxy forwards a spoofable, integrity-unbound user identity to the up
CVE-2026-59216 7.7 HIGH Open WebUI: Cross-user code-interpreter and tool execution via unvalidated Socket.IO event
CVE-2026-59221 7.7 HIGH open-webui terminal proxy path traversal guard bypass via 9x encoded traversal
CVE-2026-59214 7.3 HIGH Open WebUI: Stored web worker XSS via Pyodide
CVE-2026-59219 7.1 HIGH Open WebUI: Realtime endpoints accept Redis-revoked JWTs after signout/backchannel logout
CVE-2026-59220 6.5 MEDIUM Open WebUI: ReDoS in skill-mention regexes causes whole-instance DoS on default config
CVE-2026-59212 5.4 MEDIUM Open WebUI: Model meta.knowledge read-only file access can be upgraded to file write/delet
CVE-2026-59225 5.4 MEDIUM Open WebUI: Arena task endpoints can bypass underlying model access controls
CVE-2026-59218 5.3 MEDIUM Open WebUI: Account enumeration via observable login timing discrepancy
CVE-2026-59227 4.3 MEDIUM Open WebUI: POST /api/v1/images/edit bypasses the global image-edit switch and the per-use
CVE-2026-59217 4.3 MEDIUM Open WebUI: Upload `metadata.knowledge_id` bypasses the knowledge-base write-access check
CVE-2026-59223 4.3 MEDIUM Open WebUI: `WEB_FETCH_FILTER_LIST` host allow/block filter bypassable via URL path and no
CVE-2026-59213 3.5 LOW Open WebUI: Cross-user model-list exposure via static cache key in get_all_models (aiocach
CVE-2026-59226 3.1 LOW Open WebUI: Scheduled automations continue after pending-user deactivation and stored mode
CVE-2026-59715 3.1 LOW Open WebUI: Unauthenticated WebSocket Access to Collaborative Document Handlers (ydoc:awar
CVE-2026-59222 Open WebUI: /api/v1/channels/{id}/members exposes full user model including sensitive cred

IV. Related Vulnerabilities

Same product: open-webui
Same vendor: open-webui
Same weakness: CWE-639

V. Comments for CVE-2026-59215

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