What’s Vulnerable › Vulnerabilities

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

• Severity: low (CVSS 3.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-09 · updated 2026-07-13
• Weakness: CWE-639

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.

Affected products

• open-webui: before 0.10.0 — fixed in 0.10.0

How to fix

Upgrade to a fixed version: open-webui 0.10.0. Check the vendor advisory for mitigations.

References

• https://github.com/open-webui/open-webui/commit/a66477b7104c5d141ce7bffaea424b43e7666ef1
• https://github.com/open-webui/open-webui/pull/25766
• https://github.com/open-webui/open-webui/releases/tag/v0.10.0
• https://github.com/open-webui/open-webui/security/advisories/GHSA-73x5-h92w-xc2j
• https://github.com/open-webui/open-webui/security/advisories/GHSA-73x5-h92w-xc2j

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