Use of Incorrectly-Resolved Name or Reference Affecting starlette package, versions [,1.3.0)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-PYTHON-STARLETTE-17342519
- published16 Jun 2026
- disclosed15 Jun 2026
- creditNicolas Lamoureux
Introduced: 15 Jun 2026
CVE-2026-54282 (opens in a new tab)How to fix?
Upgrade starlette to version 1.3.0 or higher.
Overview
starlette is a The little ASGI library that shines.
Affected versions of this package are vulnerable to Use of Incorrectly-Resolved Name or Reference in the reconstruction of request.url when the HTTP request path does not begin with /. An attacker can mislead the application into trusting an attacker-controlled hostname by sending a specially crafted request path that manipulates the authority component of the URL.
Note: This is only exploitable if the ASGI server forwards a request-target lacking a leading / into scope["path"], and the application uses request.url, request.url.netloc, or request.url.hostname for security-sensitive decisions before routing or in 404/exception handlers.