{"id":"CVE-2026-50009","summary":"Netty QUIC stateless reset token material exposed through header-visible connection IDs","details":"Netty is a network application framework for development of protocol servers and clients. Prior to version 4.2.15.Final, Netty QUIC exposes the stateless reset token on the network path when using the default HMAC-based connection-ID and stateless-reset-token generators. The reset token for the server's current source connection ID can be derived from bytes that appear as the connection ID in QUIC headers after a source-CID rotation. An on-path attacker observing the headers can use the token to perform a Denial of Service by sending a spoofed Stateless Reset packet. Version 4.2.15.Final patches the issue.","aliases":["GHSA-cq4q-cv5g-r8q5"],"modified":"2026-07-15T01:49:21.253221176Z","published":"2026-06-12T14:47:09.748Z","related":["CGA-xm3m-3xc9-f9cp"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/50xxx/CVE-2026-50009.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-200","CWE-330"]},"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/2026/50xxx/CVE-2026-50009.json"},{"type":"ADVISORY","url":"https://github.com/netty/netty/security/advisories/GHSA-cq4q-cv5g-r8q5"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-50009"}],"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-2026-50009.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L"}]}