CVE-2026-59212: Open WebUI: Model meta.knowledge read-only file access can be upgraded to file write/delete

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-07-09 · updated 2026-07-10
Weakness: CWE-863

Description

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.6 before 0.10.0, _verify_knowledge_file_access only checked read access while file write and delete routes later trusted object-derived access through writable model meta.knowledge entries, allowing a user with read-only knowledge file access to upgrade to file write or delete operations. This issue is fixed in version 0.10.0.

Affected products

open-webui: 0.9.6

References

https://github.com/open-webui/open-webui/commit/17df0264929514599dbcb21c6578bcdfa204b04d
https://github.com/open-webui/open-webui/pull/26032
https://github.com/open-webui/open-webui/releases/tag/v0.10.0
https://github.com/open-webui/open-webui/security/advisories/GHSA-2xwm-4h2q-ggfx

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