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

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Summary

CVECVE-2026-59215
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-09 17:17:02 UTC
Updated2026-07-13 12:27:12 UTC
DescriptionOpen 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.

Risk And Classification

Primary CVSS: v3.1 3.1 LOW from [email protected]

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N

EPSS: 0.002570000 probability, percentile 0.171000000 (date 2026-07-13)

Problem Types: CWE-639 | CWE-639 CWE-639: Authorization Bypass Through User-Controlled Key

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary3.1LOWCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
3.1CNADECLARED3.1LOWCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Openwebui Open Webui All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Open-webui Open-webui affected < 0.10.0 Not specified

References

ReferenceSourceLinkTags
github.com/open-webui/open-webui/releases/tag/v0.10.0 [email protected] github.com Product, Release Notes
github.com/open-webui/open-webui/security/advisories/GHSA-73x5-h92w-xc2j 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com Mitigation, Vendor Advisory
github.com/open-webui/open-webui/commit/a66477b7104c5d141ce7bffaea424b43... [email protected] github.com Patch
github.com/open-webui/open-webui/pull/25766 [email protected] github.com Issue Tracking, Patch
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