CVE Watch15 jul 2026

CVE-2026-48710

Starlette is a lightweight ASGI framework/toolkit. Prior to version 1.0.1, the HTTP `Host` request header was not validated before being use

CVSS

6.5

Medio

EPSS

1.4%

p70

KEV

—

Exploit Today

0-100

Publicado: 26 may 2026 · Última mod.: 15 jul 2026 · CWE-444 · CWE-1289

EPSS · 30d

1.4%EPSS · 30 días1.4%

2026-06-302026-07-16

Descripción técnica

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.

Referencias oficiales

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