{"id":"CVE-2026-44892","summary":"Netty has a Vulnerable Default Configuration Which Leads to Denial of Service via Unbounded HTTP/3 Header Size","details":"Netty is a network application framework for development of protocol servers and clients. Prior to version 4.2.15.Final, the default configuration of the `Http3ConnectionHandler` in the Netty HTTP/3 codec lacks an enforced maximum header size limit. When a peer does not explicitly specify `HTTP3_SETTINGS_MAX_FIELD_SECTION_SIZE`, the implementation defaults to an unbounded limit. This insecure default configuration allows a malicious client or server to send an enormous number of headers, leading to a memory exhaustion Denial of Service via an `OutOfMemoryError`. Version 4.2.15.Final contains a patch.","aliases":["GHSA-c2rx-5r8w-8xr2"],"modified":"2026-07-15T01:49:13.132468622Z","published":"2026-06-12T05:04:58.033Z","related":["CGA-669q-xghx-m5ff"],"database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-1188","CWE-400"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44892.json"},"references":[{"type":"WEB","url":"https://github.com/netty/netty/releases/tag/netty-4.2.15.Final"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44892.json"},{"type":"ADVISORY","url":"https://github.com/netty/netty/security/advisories/GHSA-c2rx-5r8w-8xr2"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-44892"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/netty/netty","events":[{"introduced":"09e64d259c99be8b5b2a471a78f11e65eb82598a"},{"fixed":"a41f7b289ce1d697c50846f3ade3983e22b2ed40"}],"database_specific":{"cpe":"cpe:2.3:a:netty:netty:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"4.2.0.Final"},{"fixed":"4.2.15.Final"},{"introduced":"4.2.0"},{"fixed":"4.2.15"}],"source":["AFFECTED_FIELD","CPE_RANGE","REFERENCES"]}}],"versions":["netty-4.2.14.Final","netty-4.2.13.Final","netty-4.2.12.Final","netty-4.2.11.Final","netty-4.2.10.Final","netty-4.2.9.Final","netty-4.2.8.Final","netty-4.2.7.Final","netty-4.2.6.Final","netty-4.2.5.Final","netty-4.2.4.Final","netty-4.2.3.Final","netty-4.2.2.Final","netty-4.2.1.Final","netty-4.2.0.Final"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-44892.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}