{"id":59243,"date":"2026-06-02T10:40:20","date_gmt":"2026-06-02T10:40:20","guid":{"rendered":"https:\/\/zero.redgem.net\/?p=59243"},"modified":"2026-06-02T10:40:20","modified_gmt":"2026-06-02T10:40:20","slug":"http2-continuation-flood-in-mint-client-via-unbounded-header-block-accumulation","status":"publish","type":"post","link":"https:\/\/zero.redgem.net\/?p=59243","title":{"rendered":"HTTP\/2 CONTINUATION flood in Mint client via unbounded header-block accumulation_CVE-2026-49754"},"content":{"rendered":"<p>{&#8220;lastseen&#8221;:&#8221;&#8221;,&#8221;description&#8221;:&#8221;Allocation of Resources Without Limits or Throttling vulnerability in elixir-mint Mint allows attacker-controlled HTTP\/2 servers to exhaust memory in a Mint client (HTTP\/2 CONTINUATION flood).\\n\\nWhen Mint&#8217;s HTTP\/2 receive path observes a HEADERS frame without the END_HEADERS flag, the unparsed header-block fragment is parked in conn.headers_being_processed, and every subsequent CONTINUATION frame on that stream is appended to the accumulator. Nothing in the receive path caps the accumulator: there is no per-stream size limit, no CONTINUATION frame-count limit, and max_header_list_size is only enforced on outgoing requests, never on inbound header blocks (its default is :infinity).\\n\\nA malicious or compromised HTTP\/2 server can stream an endless sequence of CONTINUATION frames (each up to the peer-advertised SETTINGS_MAX_FRAME_SIZE) and drive the client&#8217;s iolist to arbitrary size, causing memory exhaustion and BEAM process death. A single connection to an attacker-controlled HTTP\/2 endpoint is sufficient.\\n\\nThis issue affects mint: from 0.1.0 before 1.9.0.&#8221;,&#8221;published&#8221;:&#8221;2026-06-02T14:15:14.951Z&#8221;,&#8221;modified&#8221;:&#8221;2026-06-02T14:15:14.951Z&#8221;,&#8221;type&#8221;:&#8221;cve&#8221;,&#8221;title&#8221;:&#8221;HTTP\/2 CONTINUATION flood in Mint client via unbounded header-block accumulation&#8221;,&#8221;source&#8221;:&#8221;EEF&#8221;,&#8221;references&#8221;:&#8221;https:\/\/github.com\/elixir-mint\/mint\/security\/advisories\/GHSA-2p26-p43x-fhp8\\nhttps:\/\/cna.erlef.org\/cves\/CVE-2026-49754.html\\nhttps:\/\/osv.dev\/vulnerability\/EEF-CVE-2026-49754\\nhttps:\/\/github.com\/elixir-mint\/mint\/commit\/b662d127d3028b5426c88d4c9cc7fe430491a10b&#8221;,&#8221;id&#8221;:&#8221;CVE-2026-49754&#8243;,&#8221;bulletinFamily&#8221;:&#8221;&#8221;,&#8221;cwe&#8221;:[&#8220;CWE-770&#8243;],&#8221;cvelist&#8221;:null,&#8221;sourceData&#8221;:&#8221;elixir-mint mint 0.1.0\\nelixir-mint mint 596ca4304504be68939c4929e0831557097962b8&#8243;,&#8221;sourceHref&#8221;:&#8221;&#8221;,&#8221;cvss&#8221;:{&#8220;score&#8221;:8.2,&#8221;severity&#8221;:&#8221;HIGH&#8221;,&#8221;vector&#8221;:&#8221;CVSS:4.0\/AV:N\/AC:L\/AT:P\/PR:N\/UI:N\/VC:N\/VI:N\/VA:H\/SC:N\/SI:N\/SA:N&#8221;,&#8221;version&#8221;:&#8221;4.0&#8243;},&#8221;cvss2&#8243;:{},&#8221;cvss3&#8243;:{&#8220;version&#8221;:&#8221;&#8221;,&#8221;vectorString&#8221;:&#8221;&#8221;,&#8221;baseScore&#8221;:0,&#8221;baseSeverity&#8221;:&#8221;&#8221;,&#8221;attackVector&#8221;:&#8221;&#8221;,&#8221;attackComplexity&#8221;:&#8221;&#8221;,&#8221;privilegesRequired&#8221;:&#8221;&#8221;,&#8221;userInteraction&#8221;:&#8221;&#8221;,&#8221;scope&#8221;:&#8221;&#8221;,&#8221;confidentialityImpact&#8221;:&#8221;&#8221;,&#8221;integrityImpact&#8221;:&#8221;&#8221;,&#8221;availabilityImpact&#8221;:&#8221;&#8221;,&#8221;cvssV3&#8243;:{&#8220;version&#8221;:&#8221;&#8221;,&#8221;vectorString&#8221;:&#8221;&#8221;,&#8221;baseScore&#8221;:0,&#8221;baseSeverity&#8221;:&#8221;&#8221;,&#8221;attackVector&#8221;:&#8221;&#8221;,&#8221;attackComplexity&#8221;:&#8221;&#8221;,&#8221;privilegesRequired&#8221;:&#8221;&#8221;,&#8221;userInteraction&#8221;:&#8221;&#8221;,&#8221;scope&#8221;:&#8221;&#8221;,&#8221;confidentialityImpact&#8221;:&#8221;&#8221;,&#8221;integrityImpact&#8221;:&#8221;&#8221;,&#8221;availabilityImpact&#8221;:&#8221;&#8221;}},&#8221;href&#8221;:&#8221;&#8221;,&#8221;category_name&#8221;:&#8221;CVE&#8221;,&#8221;post_link&#8221;:&#8221;&#8221;,&#8221;product&#8221;:&#8221;mint&#8221;,&#8221;version&#8221;:&#8221;0.1.0&#8243;,&#8221;vendor&#8221;:&#8221;elixir-mint&#8221;,&#8221;ai_description&#8221;:&#8221;&#8221;,&#8221;ai_severity&#8221;:&#8221;&#8221;,&#8221;ai_vendor&#8221;:&#8221;&#8221;,&#8221;ai_product&#8221;:&#8221;&#8221;,&#8221;ai_version&#8221;:&#8221;&#8221;,&#8221;ai_score&#8221;:0}<\/p>\n","protected":false},"excerpt":{"rendered":"<p>{&#8220;lastseen&#8221;:&#8221;&#8221;,&#8221;description&#8221;:&#8221;Allocation of Resources Without Limits or Throttling vulnerability in elixir-mint Mint allows attacker-controlled HTTP\/2 servers to exhaust memory in a Mint client (HTTP\/2 CONTINUATION flood).\\n\\nWhen&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[6,8,77,12,15,13,7,11,5],"class_list":["post-59243","post","type-post","status-publish","format-standard","hentry","category-category_cve","tag-cve","tag-cvss","tag-cvss-82","tag-exploit","tag-high","tag-news","tag-security","tag-tapic","tag-vulnerability"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - 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