CVE-2026-54282 | Starlette is a lightweight ASGI framework/toolkit. Prior to … | CVSS 3.7 LOW

Description

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.

Metadata

CVE ID: CVE-2026-54282
State: PUBLISHED
Assigner: GitHub_M
Reserved: 2026-06-12 17:46 UTC
Published: 2026-06-22 16:45 UTC
Last updated: 2026-06-22 17:26 UTC
Primary CWE: CWE-706
CWE-706: Use of Incorrectly-Resolved Name or Reference
Vendor / Product: Kludex / starlette
Sources: cve.org · NVD

Severity & Metrics

3.7 LOW CVSS 3.1

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

SSVC — CISA Coordinator

Exploitation: none
Automatable: no
Tech. Impact: partial

Affected products (1)

Vendor	Product	Platform	Versions
Kludex	starlette	—	< 1.3.0

Weakness (CWE)

CWE	Source	Description
CWE-706	cna	CWE-706: Use of Incorrectly-Resolved Name or Reference

CVSS scores (1)

Score	Severity	Version	Source	Vector
3.7	LOW	3.1	cna	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

References (1)

https://github.com/Kludex/starlette/security/advisories/GHSA-jp82-jpqv-5vv3 https://github.com/Kludex/starlette/security/advisories/GHSA-jp82-jpqv-5vv3