{"id":78886,"date":"2026-05-27T01:46:44","date_gmt":"2026-05-26T22:16:44","guid":{"rendered":"https:\/\/afaghhosting.net\/blog\/cve-2026-48710-starlette-has-missing-host-header-validation-that-poisons-request-url-path-bypassing-path-based-security-checks\/"},"modified":"2026-05-27T01:46:44","modified_gmt":"2026-05-26T22:16:44","slug":"cve-2026-48710-starlette-has-missing-host-header-validation-that-poisons-request-url-path-bypassing-path-based-security-checks","status":"publish","type":"post","link":"https:\/\/afaghhosting.net\/blog\/cve-2026-48710-starlette-has-missing-host-header-validation-that-poisons-request-url-path-bypassing-path-based-security-checks\/","title":{"rendered":"CVE-2026-48710 &#8211; Starlette has missing Host header validation that poisons request.url.path, bypassing path-based security checks"},"content":{"rendered":"<p>CVE ID :CVE-2026-48710<\/p>\n<p>  Published : May 26, 2026, 10:16 p.m. | 15\u00a0minutes ago<\/p>\n<p>  Description :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 \u00a73.2 \/ RFC 3986 \u00a73.2.2 when constructing `request.url` and falls back to `scope[&#8220;server&#8221;]` for malformed values.<\/p>\n<p>  Severity: 6.5 | MEDIUM<\/p>\n<p>  Visit the link for more details, such as CVSS details, affected products, timeline, and more&#8230;\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"<p>CVE ID :CVE-2026-48710 Published : May 26, 2026, 10:16 p.m. | 15\u00a0minutes ago Description :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` &hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[],"class_list":["post-78886","post","type-post","status-publish","format-standard","hentry","category-vulnerability"],"_links":{"self":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/78886","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/comments?post=78886"}],"version-history":[{"count":0,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/78886\/revisions"}],"wp:attachment":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/media?parent=78886"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/categories?post=78886"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/tags?post=78886"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}