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 NTLMv2 credentials for offline cracking or relay even though the HTTP response is only a 404. The issue affects default follow_symlink=False deployments, including frameworks built on Starlette such as FastAPI; POSIX systems and follow_symlink=True are unaffected. The issue is fixed in 1.1.0.
References
Configurations
History
30 Jun 2026, 03:20
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| References |
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26 Jun 2026, 19:17
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| First Time |
Encode starlette
Encode |
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| References | () https://github.com/Kludex/starlette/commit/fd53168a7767b6b55ba5af787fd88f49e33cabc5 - Patch | |
| References | () https://github.com/Kludex/starlette/pull/3287 - Patch | |
| References | () https://github.com/Kludex/starlette/releases/tag/1.1.0 - Release Notes | |
| References | () https://github.com/Kludex/starlette/security/advisories/GHSA-wqp7-x3pw-xc5r - Mitigation, Vendor Advisory | |
| CPE | cpe:2.3:a:encode:starlette:*:*:*:*:*:python:*:* |
17 Jun 2026, 20:17
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| New CVE |
Information
Published : 2026-06-17 19:18
Updated : 2026-07-15 02:22
NVD link : CVE-2026-48818
Mitre link : CVE-2026-48818
CVE.ORG link : CVE-2026-48818
JSON object : View
Products Affected
encode
- starlette
CWE
CWE-918
Server-Side Request Forgery (SSRF)
