Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Open WebUI versions before 0.11.0 are vulnerable to a DNS rebinding bypass of its server-side request checks. An attacker with an account who controls DNS for a hostname they submit (through URL ingest, chat image URLs, image editing, or OAuth profile-picture fetching where configured) can make the server request internal addresses such as cloud metadata or loopback services, and may read the response back. Upgrade to Open WebUI 0.11.0 or later, which validates the connection address itself.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 6.3 | Medium | 3.1 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0025, the 16th percentile, on 11 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:40 UTC First seen by agentprime
- 31 Oct 2026, 14:40 UTC Confirmed by OSV