CVE-2026-48818 Starlette: SSRF and NTLM credential theft via UNC paths in StaticFiles on Windows

Starlette is a lightweight ASGI framework/toolkit. In versions 1.0.1 and earlier, StaticFiles on Windows is vulnerable to SSRF. An UNC path such as \attacker.com\share can cause os.path.realpath to initiate an outbound SMB connection before the path is rejected, exposing the service account’s...

SUSE-SU-2026:22151-1 Security update for python-starlette

This update for python-starlette fixes the following issues - CVE-2025-54121: denial-of-service when parsing a multi-part form with large files bsc1246855. - CVE-2025-62727: DoS via Range header merging bsc1252805. - CVE-2026-48710: Missing Host header validation poisons request.url.path, bypassi...

GHSA-94F4-HR76-P5J6 vLLM: OpenAI auth bypass

Summary A vulnerability in ASGI web servers and starlette's trust on those web servers enables an authentication bypass of the OpenAI API AuthenticationMiddleware, which was discovered during @x41sec's source code audit. It allows to use the API without providing the configured VLLMAPIKEY or...

Allocation of Resources Without Limits or Throttling

Overview starlette is a The little ASGI library that shines. Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling via the request.form. An attacker can exhaust system resources and disrupt service availability by submitting a specially crafted...

Starlette: request.form() limits silently ignored for application/x-www-form-urlencoded enable DoS

Summary request.form accepts maxfields and maxpartsize to bound resource consumption while parsing form data. These limits are enforced for multipart/form-data, but silently ignored for application/x-www-form-urlencoded. An unauthenticated attacker can therefore send a urlencoded body with an...

GHSA-82W8-QH3P-5JFQ Starlette: request.form() limits silently ignored for application/x-www-form-urlencoded enable DoS

Summary request.form accepts maxfields and maxpartsize to bound resource consumption while parsing form data. These limits are enforced for multipart/form-data, but silently ignored for application/x-www-form-urlencoded. An unauthenticated attacker can therefore send a urlencoded body with an...

GHSA-JP82-JPQV-5VV3 Starlette: Unvalidated request path concatenated into authority poisons request.url.hostname

Summary In affected versions, the HTTP request path is not validated before being used to reconstruct request.url. Because request.url is rebuilt by concatenating scheme://hostpath and re-parsing the result, a path that does not begin with / for example @google.com moves the authority boundary...

Starlette: Unvalidated request path concatenated into authority poisons request.url.hostname

Summary In affected versions, the HTTP request path is not validated before being used to reconstruct request.url. Because request.url is rebuilt by concatenating scheme://hostpath and re-parsing the result, a path that does not begin with / for example @google.com moves the authority boundary...

Use of Incorrectly-Resolved Name or Reference

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 trusti...

GHSA-6JV3-5F52-599M python-multipart: Semicolon treated as querystring field separator enables parameter smuggling

Summary QuerystringParser treated ; as a field separator in application/x-www-form-urlencoded bodies, in addition to &. The WHATWG URL standard, modern browsers, and Python's urllib.parse since the CVE-2021-23336 fix treat only & as a separator. This creates a parser differential: the same bytes...

Server-side Request Forgery (SSRF)

Overview starlette is a The little ASGI library that shines. Affected versions of this package are vulnerable to Server-side Request Forgery SSRF in the StaticFiles file on Windows systems when handling UNC paths. An attacker can obtain NTLMv2 credentials of the service account by sending a...

Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection')

Overview starlette is a The little ASGI library that shines. Affected versions of this package are vulnerable to Use of Externally-Controlled Input to Select Classes or Code 'Unsafe Reflection' when dispatching HTTP requests to endpoint attributes via getattr. An attacker can invoke internal...

python311-starlette-1.2.0-1.1 on GA media (moderate)

python311-starlette-1.2.0-1.1 on GA media Announcement ID: openSUSE-SU-2026:11026-1 Rating: moderate Cross-References: CVE-2026-48710 CVSS scores: CVE-2026-48710 SUSE : 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N CVE-2026-48710 SUSE : 6.9...

PT-2026-49597

Name of the Vulnerable Software and Affected Versions Starlette affected versions not specified FastAPI affected versions not specified Description A Denial of Service DoS issue exists in the request.form function when processing application/x-www-form-urlencoded requests. While limits for max...

OPENSUSE-SU-2026:11026-1 python311-starlette-1.2.0-1.1 on GA media

These are all security issues fixed in the python311-starlette-1.2.0-1.1 package on the GA media of openSUSE Tumbleweed...

[SECURITY] Fedora 44 Update: python-starlette-0.52.1-2.fc44

Starlette is a lightweight ASGI framework/toolkit, which is ideal for building async web services in Python. It is production-ready, and gives you the following: =E2=80=A2 A lightweight, low-complexity HTTP web framework. =E2=80=A2 WebSocket support. =E2=80=A2 In-process background tasks. =E2=80=...

Fedora 44 : python-starlette (2026-3bce8d3f11)

The remote Fedora 44 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-3bce8d3f11 advisory. Backport fix for CVE-2026-48710 Tenable has extracted the preceding description block directly from the Fedora security advisory. Note that Nessus has not...

Fedora 43 : python-starlette (2026-e0f378428e)

The remote Fedora 43 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-e0f378428e advisory. Backport fix for CVE-2026-48710 Tenable has extracted the preceding description block directly from the Fedora security advisory. Note that Nessus has not...

EUVD-2026-32016

Starlette has missing Host header validation that poisons request.url.path, bypassing path-based security checks...

GHSA-86QP-5C8J-P5MR Starlette has missing Host header validation that poisons request.url.path, bypassing path-based security checks

Summary In affected versions, 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 pa...