{"id":29742,"date":"2026-09-27T00:31:35","date_gmt":"2026-09-26T16:31:35","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-100662"},"modified":"2026-09-27T00:31:35","modified_gmt":"2026-09-26T16:31:35","slug":"cve-2026-100662","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-100662","title":{"rendered":"CVE-2026-100662 [HIGH] &#8211; Netty&#8217;s HTTP\/3 codec (io.netty:netty-codec-http3) versions 4.2.0.Final through 4.2.17.Fina"},"content":{"rendered":"<p>Netty&#8217;s HTTP\/3 codec (io.netty:netty-codec-http3) versions 4.2.0.Final through 4.2.17.Final contain an uncontrolled resource consumption vulnerability in the QPACK encoder-stream instruction decoder (QpackEncoderHandler, installed on the peer-initiated unidirectional QPACK encoder stream, type 0x02). The handler accepts an attacker-declared string-literal length of up to Integer.MAX_VALUE (~2 GiB) for the Name Length and Value Length fields of the &#8220;Insert With Literal Name&#8221; instruction (RFC 9204 \u00a74.3.3), with no per-instruction or per-literal length cap and no cumulation-size limit; the existing HTTP\/3 limits (maxHeaderListSize, maxUnknownFramePayloadLength, DEFAULT_MAX_FIELD_SECTION_SIZE) are not applied to this handler. A remote, unauthenticated peer with an established HTTP\/3 connection to a default Netty HTTP\/3 server can declare a very large literal length and then trickle fewer bytes than declared, causing the ByteToMessageDecoder MERGE cumulator to retain and grow the per-connection buffer, and ultimately triggering a large byte-array allocation. This leads to unbounded per-connection heap growth and OutOfMemoryError, resulting in denial of service. Fixed in 4.2.18.Final.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Netty&#8217;s HTTP\/3 codec (io.netty:netty-codec-http3) versions 4.2.0.Final through 4.2.17.Final contain an uncontrolled resource consumption vulnerability in the QPACK encoder-stream instruction decoder (<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-29742","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/29742","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln"}],"about":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/types\/vuln"}],"wp:attachment":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=29742"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=29742"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=29742"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}