netty-codec-http2: Netty: Denial of Service due to HTTP/2 max header size handling

A flaw was found in Netty, a network application framework. A remote attacker can exploit a vulnerability in the HTTP/2 Hypertext Transfer Protocol version 2 maximum header size handling. By sending a specific SETTINGSMAXHEADERLISTSIZE setting, an attacker can cause Netty to produce an exception...

PT-2026-47603

Name of the Vulnerable Software and Affected Versions Netty affected versions not specified Description The default configuration of the Http3ConnectionHandler in the Netty HTTP/3 codec does not enforce a maximum header size limit. When a peer does not specify HTTP3 SETTINGS MAX FIELD SECTION SIZ...

CVE-2026-10725

Protocol::HTTP2 versions through 1.12 for Perl is vulnerable to a HTTP/2 Bomb. Protocol::HTTP2's inbound HPACK path has no header-list size limit, so a small HTTP/2 request can expand into large server memory the "HTTP/2 bomb". The headersdecode method materialises a full key+value copy per index...