جزئیات آسیب‌پذیری

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.

• https://access.redhat.com/security/cve/CVE-2026-48818 vdb-entryx_refsource_REDHAT
• https://github.com/Kludex/starlette/security/advisories/GHSA-wqp7-x3pw-xc5r x_refsource_CONFIRM
• https://github.com/Kludex/starlette/pull/3287 x_refsource_MISC
• https://github.com/Kludex/starlette/commit/fd53168a7767b6b55ba5af787fd88f49e33cabc5 x_refsource_MISC
• https://github.com/Kludex/starlette/releases/tag/1.1.0 x_refsource_MISC
• https://github.com/pypa/advisory-database/tree/main/vulns/starlette/PYSEC-2026-2281.yaml x_refsource_MISC
• https://bugzilla.redhat.com/show_bug.cgi?id=2490020 issue-trackingx_refsource_REDHAT
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-48818.json x_sadp-csaf-vex
• https://access.redhat.com/errata/RHSA-2026:30089 vendor-advisoryx_refsource_REDHAT
• https://access.redhat.com/errata/RHSA-2026:30088 vendor-advisoryx_refsource_REDHAT
• https://access.redhat.com/errata/RHSA-2026:30087 vendor-advisoryx_refsource_REDHAT