{"cve":"CVE-2026-54282","nvd":{"published":"2026-06-22T18:16:46.807","modified":"2026-10-25T23:10:00.167","status":"Analyzed","description":"Starlette is a lightweight ASGI framework/toolkit. Prior to 1.3.0, the HTTP request path is not validated before being used to reconstruct request.url. Because request.url is rebuilt by concatenating {scheme}://{host}{path} and re-parsing the result, a path that does not begin with / (for example @google.com) moves the authority boundary during re-parsing, so request.url.hostname and request.url.netloc become attacker-controlled. Code that reads request.url.hostname (rather than the Host header or scope) can therefore be misled into trusting an attacker-supplied host. This vulnerability is fixed in 1.3.0.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","score":5.3},"cwes":["CWE-706"],"references":["https://github.com/Kludex/starlette/security/advisories/GHSA-jp82-jpqv-5vv3"],"products":["encode:starlette"],"source":"nvd","synced_at":"2026-10-25T23:44:33.281319194+00:00"},"epss":{"cve":"CVE-2026-54282","score":0.00273,"percentile":0.195,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-jp82-jpqv-5vv3","url":"https://osv.dev/vulnerability/GHSA-jp82-jpqv-5vv3","summary":"Starlette: Unvalidated request path concatenated into authority poisons request.url.hostname","modified":"2026-09-10T03:50:50.050800090Z","packages":[{"ecosystem":"PyPI","name":"starlette","purl":"pkg:pypi/starlette","ranges":["<1.3.0"],"fixed":["1.3.0"]}]},{"id":"PYSEC-2026-248","url":"https://osv.dev/vulnerability/PYSEC-2026-248","summary":"","modified":"2026-06-27T11:15:06.799060438Z","packages":[{"ecosystem":"PyPI","name":"starlette","purl":"pkg:pypi/starlette","ranges":["<1.3.0"],"fixed":["1.3.0"]}]}],"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."]}