Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
AV AC PR UI S C I A CVSS EPSS %ile KEV N L L N U H N N 6.5 .0042 33.7 —
AFFECTED Product Versions Fixed open-webui >= 0.8.8, < 0.11.0 – —
TIMELINE Aug 4 Reserved by GitHub_M Aug 4 Published (CNA: GitHub_M) Sep 18 RESCORED — CVE-2026-70487 (open-webui). CVSS 5.3 → 6.5 (NVD).
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.
| Date | Event | Detail |
|---|---|---|
| August 4, 2026 | Reserved | Reserved by GitHub_M |
| August 4, 2026 | Published | Published (CNA: GitHub_M) |
| September 18, 2026 | RESCORED | RESCORED — CVE-2026-70487 (open-webui). CVSS 5.3 → 6.5 (NVD). |
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|---|---|---|---|
| open-webui | open-webui | — | >= 0.8.8, < 0.11.0 | — |
Authoritative record: CVE-2026-70487 at cve.org
Vendors: open-webui
Weaknesses: CWE-862
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-70487 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
