{"id":72552,"date":"2025-10-28T23:44:53","date_gmt":"2025-10-28T20:14:53","guid":{"rendered":"https:\/\/afaghhosting.net\/blog\/cve-2025-62727-starlette-vulnerable-to-on2-dos-via-range-header-merging-in-starlette-responses-fileresponse\/"},"modified":"2025-10-28T23:44:53","modified_gmt":"2025-10-28T20:14:53","slug":"cve-2025-62727-starlette-vulnerable-to-on2-dos-via-range-header-merging-in-starlette-responses-fileresponse","status":"publish","type":"post","link":"https:\/\/afaghhosting.net\/blog\/cve-2025-62727-starlette-vulnerable-to-on2-dos-via-range-header-merging-in-starlette-responses-fileresponse\/","title":{"rendered":"CVE-2025-62727 &#8211; Starlette vulnerable to O(n^2) DoS via Range header merging in starlette.responses.FileResponse"},"content":{"rendered":"<p>CVE ID : CVE-2025-62727<\/p>\n<p>Published :  Oct. 28, 2025, 8:14 p.m. | 30\u00a0minutes ago<\/p>\n<p>Description : Starlette is a lightweight ASGI framework\/toolkit. Prior to 0.49.1 , an unauthenticated attacker can send a crafted HTTP Range header that triggers quadratic-time processing in Starlette&#8217;s FileResponse Range parsing\/merging logic. This enables CPU exhaustion per request, causing denial\u2011of\u2011service for endpoints serving files (e.g., StaticFiles or any use of FileResponse). This vulnerability is fixed in 0.49.1.<\/p>\n<p>Severity: 0.0 | NA<\/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-2025-62727 Published : Oct. 28, 2025, 8:14 p.m. | 30\u00a0minutes ago Description : Starlette is a lightweight ASGI framework\/toolkit. Prior to 0.49.1 , an unauthenticated attacker can send a crafted HTTP Range header that triggers quadratic-time processing in Starlette&#8217;s FileResponse Range parsing\/merging logic. This enables CPU exhaustion per request, causing denial\u2011of\u2011service for &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-72552","post","type-post","status-publish","format-standard","hentry","category-vulnerability"],"_links":{"self":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/72552","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=72552"}],"version-history":[{"count":0,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/72552\/revisions"}],"wp:attachment":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/media?parent=72552"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/categories?post=72552"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/tags?post=72552"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}