CVE Catalog

CVE-2026-70487

MediumCVSS 5.3
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.25%

16th percentile - higher than 16% of all known CVEs

Summary

Open WebUI from 0.8.8 until 0.11.0 accepts client-supplied knowledge attachments without filtering them against the caller's read access. Any authenticated user who knew another user's file id could have the builtin knowledge tools return indexed chunks from that file, causing a read-only cross-user confidentiality loss. This issue is fixed in 0.11.0.

Risk Assessment

Confidentiality breach between users, potentially exposing sensitive information stored in other users' files.

Recommendation

Upgrade Open WebUI to version 0.11.0 or later. Additionally, restrict file access at the application level.

Other vulnerabilities in Open WebUI

See all
Original NVD description (English source)

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.8.8 until 0.11.0, inline direct model metadata accepted client-supplied knowledge attachments without filtering them against the caller's read access. Any authenticated user who knew another user's file id could have the builtin knowledge tools return indexed chunks from that file, causing a read-only cross-user confidentiality loss while leaving knowledge-base permissions and saved workspace model validation unaffected. This issue is fixed in 0.11.0.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS