GHSA-w466-2wfc-8g58High· 7.5▾ TwilightOpen WebUI has vulnerable dependency on starlette via fastapi
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 41.3 · likelihood 0 · exploitation 0
Need a working PoC? Pro members can cast a request and our team develops one — it lands right here.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via OSV
Last analysed / modified upstream
In version 0.3.32 of open-webui, the application uses a vulnerable version of the starlette package through its dependency on fastapi. The starlette package versions <=0.49 are susceptible to uncontrolled resource consumption, which can be exploited to cause a denial of service through memory exhaustion. This issue is addressed in fastapi version 0.115.3.
open-webui < 0.5.8Upgrade to a patched release:
open-webui 0.5.8Connected by shared product, vendor, weakness, or advisory.
CVE-2026-45339Medium· 6.5Open WebUI's API key endpoint restrictions bypassed via `x-api-key` header — full message processing on restricted endpoints
CVE-2026-56400High· 8.3Open WebUI has a CORS misconfiguration and session validation issue
CVE-2026-56398High· 7.3Open WebUI vulnerable to stored XSS via OAuth picture claim stored as SVG data URI in profile_image_url
CVE-2026-45666Medium· 6.5Open WebUI has an Indirect Object Reference (IDOR) in user notes
CVE-2026-45385Medium· 4.3Open WebUI has an IDOR vulnerability in the update_message_by_id API endpoint
CVE-2026-29071Low· 3.1Open WebUI's Insecure Direct Object Reference (IDOR) allows access to other users' memories