Vulnerability · Published Aug 4, 2026 · Assigned by GitHub_M
CVE-2026-54020Open WebUI: DNS Rebinding SSRF Bypass
Medium 6.3
In plain English
A medium-severity server-side request forgery in open-webui from open-webui. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 17% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. Prior to 0.11.0, Open WebUI resolved a hostname during URL validation and rejected private, loopback, and link-local addresses, but the HTTP clients resolved the hostname again at connection time. An authenticated attacker who controlled authoritative DNS for a submitted hostname could answer with a public address during validation and an internal one during connection, reaching cloud metadata, loopback admin APIs, or internal services through URL ingest, chat image_url fetches, image editing, or OAuth profile-picture fetches, with most paths returning the response to the attacker and the OAuth path forwarding the OAuth access token. This issue is fixed in 0.11.0.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| PyPI | open-webui | 0.11.0 | GHSA-h6x2-583h-x99r |
| PyPI | open-webui | 0.11.0 | PYSEC-2026-3647 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| open-webui | open-webui | < 0.11.0 |
Weakness: CWE-367, CWE-918 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
References
- https://github.com/open-webui/open-webui/security/advisories/GHSA-h6x2-583h-x99r x_refsource_CONFIRM
- https://github.com/open-webui/open-webui/releases/tag/v0.11.0 x_refsource_MISC