CVE-2026-54020Medium· 6.3▾ SunlitOpen 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 re…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 34.7 · likelihood 0 · exploitation 0
Need a working PoC? Pro members can cast a request and our team develops one — it lands right here.
Exploit-prediction probability, daily snapshots since Aug 5.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.2%
Last analysed / modified upstream
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.
open_webui < 0.11.0Upgrade past the affected range:
open_webui 0.11.0Affected packages:
open-webui <= 0.10.2Patched in:
open-webui 0.11.0Connected by shared product, vendor, weakness, or advisory.
CVE-2026-87996High· 7.7Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform
CVE-2026-70480Medium· 4.1Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform
CVE-2026-70485High· 7.1Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform
CVE-2026-70479High· 7.7Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform
CVE-2026-70489Medium· 6.5Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform
CVE-2026-70491Medium· 6.5Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform