Starlette is a lightweight ASGI framework/toolkit. Prior to version 1.0.1, the HTTP `Host` request header was not validated before being used to reconstruct `request.url`. Because the routing algorithm relies on the raw HTTP path while `request.url` is rebuilt from the `Host` header, a malformed header could make `request.url.path` differ from the path that was actually requested. Middleware and endpoints that apply security restrictions based on `request.url` (rather than the raw `scope` path) could therefore be bypassed. Users should upgrade to a version greater than or equal to version 1.0.1, which validates the `Host` header against the grammar of RFC 9112 §3.2 / RFC 3986 §3.2.2 when constructing `request.url` and falls back to `scope["server"]` for malformed values.
References
Configurations
Configuration 1 (hide)
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Configuration 2 (hide)
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History
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Information
Published : 2026-05-26 22:16
Updated : 2026-09-04 15:59
NVD link : CVE-2026-48710
Mitre link : CVE-2026-48710
CVE.ORG link : CVE-2026-48710
JSON object : View
Products Affected
encode
- starlette
redhat
- ai_inference_server
- openshift_ai
- enterprise_linux_ai
- ansible_automation_platform
- openshift_lightspeed
- migration_toolkit_for_applications
- satellite
