Vulnerability · Published Jul 9, 2026 · Assigned by GitHub_M

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

Low 3.1

In plain English

A low-severity authorization bypass via user-controlled key in open-webui from open-webui. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 25% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)3.1Low

Exploit odds (30 days)0.3%top 74.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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 packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
PyPI	open-webui	0.10.0	GHSA-73x5-h92w-xc2j
PyPI	open-webui	0.10.0	PYSEC-2026-3591

Affected products (as reported)

Vendor	Product	Versions
open-webui	open-webui	< 0.10.0

Weakness: CWE-639 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N

References

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