CVE-2026-48710 Details.
Starlette - Improper Validation of Unsafe Equivalence in Input
Atlas does not check this one. Needs requests that change data.
To test for this one, the check would have to send requests that could change data on the site. Atlas only ever reads public pages, so it does not run this check.
About CVE-2026-48710. What It Means.
A flaw was found in Starlette, a lightweight ASGI (Asynchronous Server Gateway Interface) framework. A remote attacker could exploit this vulnerability by sending a specially crafted HTTP Host request header. This malformed header could cause the request.url to be incorrectly reconstructed, leading to a discrepancy with the actual requested path. Consequently, security restrictions enforced by middleware and endpoints that rely on request.url for validation could be bypassed…
Affected Product. What Is Hit.
- Vendor
- kludex
- Product
- Kludex Starlette
References. Where To Read More.
FAQ
Common Questions.
Starlette - Improper Validation of Unsafe Equivalence in Input. A flaw was found in Starlette, a lightweight ASGI (Asynchronous Server Gateway Interface) framework. A remote attacker could exploit this vulnerability by sending a specially crafted HTTP Host request header. This malformed header could cause the request.url to be incorrectly reconstructed, leading to a discrepancy with the actual requested path. Consequently, security restrictions enforced by middleware and endpoints that rely on request.url for validation could be bypassed…
No. To test for this one, the check would have to send requests that could change data on the site. Atlas only ever reads public pages, so it does not run this check. The facts about CVE-2026-48710 are on this page, and you can request a demo to see how Brandefense watches your whole external attack surface.
Yes. CVE-2026-48710 is on the CISA Known Exploited Vulnerabilities list, which means attackers have used it against real targets.
Update Kludex Starlette to the latest version from the vendor, or follow the vendor's advice to switch off the affected feature. Vendor links are listed on this page when they are known.
This page lists the public facts about CVE-2026-48710. Atlas does not run a check for it, so nothing here says whether a particular site is affected.