CVE-2026-70479
Medium
Elevated severity or exploit probability.
CVSS base
7.7
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
EPSS — probability of exploitation (30 days)
0.3%
18.0th percentile
CISA KEV
Not listed
Weakness / dates
CWE-918
Published 2026-08-04 · modified 2026-09-18
CVSS breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
| Attack Vector | N | Network |
| Attack Complexity | L | Low |
| Privileges Required | L | Low |
| User Interaction | N | None |
| Scope | C | Changed |
| Confidentiality | H | High |
| Integrity | N | None |
| Availability | N | None |
Timeline
- 2026-08-04 — Published (NVD)
- 2026-09-18 — Last modified (NVD)
Description
Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.6 until 0.11.0, with WEB_LOADER_ENGINE=playwright, the Playwright web loader validates only the top-level page request and lets sub-resource requests pass unvalidated. A page supplied by an authenticated user can use JavaScript to reach blocked internal addresses, and returned DOM can include data read from those addresses in web-search or RAG output. This issue is fixed in 0.11.0.
Affected
References
- https://github.com/open-webui/open-webui/commit/bef63a2ae915571d50d2722a635e8bfa753d7877
- https://github.com/open-webui/open-webui/pull/27526
- https://github.com/open-webui/open-webui/releases/tag/v0.11.0
- exploit https://github.com/open-webui/open-webui/security/advisories/GHSA-w2rx-84hp-gg95
- exploit https://github.com/open-webui/open-webui/security/advisories/GHSA-w2rx-84hp-gg95