Cloudanix VulnDB

CVE-2026-54282

Low · 3.7

CVSS

3.7

EPSS

0.3%

Published

Jun 22, 2026

CISA due date

—

The record

Starlette is a lightweight ASGI framework/toolkit. Prior to 1.3.0, the HTTP request path is not validated before being used to reconstruct request.url. Because request.url is rebuilt by concatenating {scheme}://{host}{path} and re-parsing the result, a path that does not begin with / (for example @google.com) moves the authority boundary during re-parsing, so request.url.hostname and request.url.netloc become attacker-controlled. Code that reads request.url.hostname (rather than the Host header or scope) can therefore be misled into trusting an attacker-supplied host. This vulnerability is fixed in 1.3.0.

Affected packages

Ecosystem Package Introduced Fixed
openSUSE:Leap 16.0 python-starlette 0 0.41.3-160000.4.1
openSUSE:Tumbleweed python-starlette 0 1.3.1-1.1

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