HTTP Request Smuggling Affecting python313-starlette package, versions <0.41.3-160000.3.1


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

Exploit Maturity
Attacked
EPSS
7.06% (94th percentile)

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  • Snyk IDSNYK-SLES1600-PYTHON313STARLETTE-17440036
  • published24 Jun 2026
  • disclosed17 Jun 2026

Introduced: 17 Jun 2026

CVE-2026-48710  (opens in a new tab)
CWE-444  (opens in a new tab)

How to fix?

Upgrade SLES:16.0.0 python313-starlette to version 0.41.3-160000.3.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python313-starlette package and not the python313-starlette package as distributed by SLES. See How to fix? for SLES:16.0.0 relevant fixed versions and status.

Starlette is a lightweight ASGI framework/toolkit. Prior to version 1.0.1, 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 path that was actually requested. Middleware and endpoints that apply security restrictions based on request.url (rather than the raw scope path) could therefore be bypassed. Users should upgrade to a version greater than or equal to version 1.0.1, which validates the Host header against the grammar of RFC 9112 §3.2 / RFC 3986 §3.2.2 when constructing request.url and falls back to scope[&#34;server&#34;] for malformed values.

References

CVSS Base Scores

version 3.1