{"cve":"CVE-2026-48818","nvd":{"published":"2026-06-17T19:18:09.807","modified":"2026-10-26T11:10:00.157","status":"Modified","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","score":7.5},"cwes":["CWE-918"],"references":["https://github.com/Kludex/starlette/commit/fd53168a7767b6b55ba5af787fd88f49e33cabc5","https://github.com/Kludex/starlette/pull/3287","https://github.com/Kludex/starlette/releases/tag/1.1.0","https://github.com/Kludex/starlette/security/advisories/GHSA-wqp7-x3pw-xc5r","https://github.com/pypa/advisory-database/tree/main/vulns/starlette/PYSEC-2026-2281.yaml"],"products":["encode:starlette"],"source":"nvd","synced_at":"2026-10-26T11:33:08.859761529+00:00"},"epss":{"cve":"CVE-2026-48818","score":0.00368,"percentile":0.30382,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-wqp7-x3pw-xc5r","url":"https://osv.dev/vulnerability/GHSA-wqp7-x3pw-xc5r","summary":"Starlette: SSRF and NTLM credential theft via UNC paths in StaticFiles on Windows","modified":"2026-09-10T03:50:51.079936646Z","packages":[{"ecosystem":"PyPI","name":"starlette","purl":"pkg:pypi/starlette","ranges":["<1.1.0"],"fixed":["1.1.0"]}]},{"id":"PYSEC-2026-2281","url":"https://osv.dev/vulnerability/PYSEC-2026-2281","summary":"","modified":"2026-07-13T07:15:42.493904758Z","packages":[{"ecosystem":"PyPI","name":"starlette","purl":"pkg:pypi/starlette","ranges":["<1.1.0"],"fixed":["1.1.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}