{"id":82117,"date":"2026-07-17T03:46:25","date_gmt":"2026-07-17T00:16:25","guid":{"rendered":"https:\/\/afaghhosting.net\/blog\/cve-2026-54340-h2o-has-http-2-state-amplification\/"},"modified":"2026-07-17T03:46:25","modified_gmt":"2026-07-17T00:16:25","slug":"cve-2026-54340-h2o-has-http-2-state-amplification","status":"publish","type":"post","link":"https:\/\/afaghhosting.net\/blog\/cve-2026-54340-h2o-has-http-2-state-amplification\/","title":{"rendered":"CVE-2026-54340 &#8211; h2o has HTTP\/2 state amplification"},"content":{"rendered":"<p>CVE ID :CVE-2026-54340<\/p>\n<p>  Published : July 17, 2026, 12:16 a.m. | 1\u00a0hour, 19\u00a0minutes ago<\/p>\n<p>  Description :h2o is an HTTP server with support for HTTP\/1.x, HTTP\/2 and HTTP\/3. Prior to commit 9265bdd, there is an HTTP\/2 state amplification issue that combines HPACK decompression amplification with Slowloris-style stream stalling. Amplified decoded header state can be retained by stalled HTTP\/2 streams, and depending on the configuration, additional limits are needed to bound decoded header state and prevent attack. This issue has been fixed by commit 9265bdd.<\/p>\n<p>  Severity: 7.5 | HIGH<\/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-2026-54340 Published : July 17, 2026, 12:16 a.m. | 1\u00a0hour, 19\u00a0minutes ago Description :h2o is an HTTP server with support for HTTP\/1.x, HTTP\/2 and HTTP\/3. Prior to commit 9265bdd, there is an HTTP\/2 state amplification issue that combines HPACK decompression amplification with Slowloris-style stream stalling. Amplified decoded header state can be retained by &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-82117","post","type-post","status-publish","format-standard","hentry","category-vulnerability"],"_links":{"self":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/82117","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=82117"}],"version-history":[{"count":0,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/82117\/revisions"}],"wp:attachment":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/media?parent=82117"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/categories?post=82117"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/tags?post=82117"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}