{"id":82602,"date":"2026-07-27T22:47:21","date_gmt":"2026-07-27T19:17:21","guid":{"rendered":"https:\/\/afaghhosting.net\/blog\/cve-2026-64647-next-js-response-body-cache-confusion-with-invalid-utf-8-request-bodies\/"},"modified":"2026-07-27T22:47:21","modified_gmt":"2026-07-27T19:17:21","slug":"cve-2026-64647-next-js-response-body-cache-confusion-with-invalid-utf-8-request-bodies","status":"publish","type":"post","link":"https:\/\/afaghhosting.net\/blog\/cve-2026-64647-next-js-response-body-cache-confusion-with-invalid-utf-8-request-bodies\/","title":{"rendered":"CVE-2026-64647 &#8211; Next.js: Response Body Cache Confusion with Invalid UTF-8 Request Bodies"},"content":{"rendered":"<p>CVE ID :CVE-2026-64647<\/p>\n<p>  Published : 27. Juli 2026 19:17 | 38\u00a0Minuten ago<\/p>\n<p>  Description :Next.js is a React framework for building full-stack web applications. In versions 12.0.0 through 15.5.20 and 16.0.0 through 16.2.10, a server-side fetch with a request body may return a cached response body from a different request to the same URL but different body. Confidential data in the POST&#8217;s response body would then leak to unauthorized requests. Though the request itself will not be deduped. This is only an issue when receiving request bodies with a content type charset other than UTF-8. For example, the UTF-16 byte sequences for \uc083\uc083 and \uc104\uc104 in the request body would share the same cache. This issue has been fixed in versions 15.5.21 and 16.2.11.<\/p>\n<p>  Severity: 6.3 | 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-2026-64647 Published : 27. Juli 2026 19:17 | 38\u00a0Minuten ago Description :Next.js is a React framework for building full-stack web applications. In versions 12.0.0 through 15.5.20 and 16.0.0 through 16.2.10, a server-side fetch with a request body may return a cached response body from a different request to the same URL but different &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-82602","post","type-post","status-publish","format-standard","hentry","category-vulnerability"],"_links":{"self":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/82602","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=82602"}],"version-history":[{"count":0,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/82602\/revisions"}],"wp:attachment":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/media?parent=82602"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/categories?post=82602"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/tags?post=82602"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}