원문 설명
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["server"]` for malformed values.
실제 악용 확인(CISA KEV)
- KEV 등재일
- 2026-09-02
- 조치 기한(미 연방기관)
- 2026-09-16
- 랜섬웨어 사용
- Unknown
- 요구 조치
- Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
상세
- 공개일
- 2026-05-27
- 최종 수정
- 2026-10-02
- CVSS 벡터
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N- CWE
- CWE-444
- EPSS(30일 내 악용 확률)
- 70.29% (백분위 99)
참고 자료
- cve.org/CVE-2026-48710
- nvd.nist.gov/vuln/detail/CVE-2026-48710
- github.com/Kludex/starlette/security/advisories/GHSA-86qp-5c8j-p5mr
- github.com/Kludex/starlette/commit/764dab0dcfb9033d75442d7a359645c9f94648c6
- badhost.org
- github.com/pypa/advisory-database/tree/main/vulns/starlette/PYSEC-2026-161.yaml
- ostif.org/disclosing-the-badhost-vulnerability-in-starlette
- www.secwest.net/starlette
- www.x41-dsec.de/lab/advisories/x41-2026-002-starlette
내 서버의 버전을 직접 추적하세요
InfraGuard 는 모든 서버에 설치된 소프트웨어 버전을 수집하고, 알려진 취약점이 있는 버전을 알려 줍니다. 자체 호스팅이라 데이터가 내 네트워크를 벗어나지 않습니다.
이 제품은 NVD API 데이터를 사용하지만 NVD 의 보증이나 인증을 받은 것은 아닙니다. CVE® 는 The MITRE Corporation 의 등록 상표이며, CVE 레코드는 CVE Program 이용 약관에 따라 사용합니다.