{"action":"Upgrade io.netty:netty-handler to 4.1.137.Final (4.1.x) or 4.2.17.Final (4.2.x) or later.","affected":[{"fixed":"4.2.17.Final","introduced":"4.2.0.Final"},{"fixed":"4.1.137.Final","introduced":"0"}],"component":"io.netty:netty-handler","cve_ids":["CVE-2026-75596"],"ecosystem":"Maven","epss":0.00374,"exploited":false,"fixed_versions":["4.2.17.Final","4.1.137.Final"],"ghsa_id":"GHSA-fccg-mwvh-qqg4","id":"tcs_01M5N8VRA8FXBPSA14AQ60DT8K","modified_at":"2026-09-08T18:27:48.113951573Z","published_at":"2026-09-08T18:14:56Z","references":["https://osv.dev/vulnerability/GHSA-fccg-mwvh-qqg4","https://github.com/netty/netty/security/advisories/GHSA-fccg-mwvh-qqg4","https://nvd.nist.gov/vuln/detail/CVE-2026-75596","https://github.com/netty/netty/pull/17213","https://github.com/netty/netty/pull/17217","https://github.com/netty/netty/commit/1b5abc6443b63726c72cdd285af2feb7ddbb8ff7","https://github.com/netty/netty/commit/9e0519239108a69b7e9bbc5e9182ee139a0d7961","https://github.com/netty/netty","https://github.com/netty/netty/releases/tag/netty-4.1.137.Final","https://github.com/netty/netty/releases/tag/netty-4.2.17.Final"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"GHSA-fccg-mwvh-qqg4","url":"https://osv.dev/vulnerability/GHSA-fccg-mwvh-qqg4"},{"source":"nvd","source_id":"CVE-2026-75596","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-75596"}],"summary":"Netty: Fragmented ClientHello records trigger quadratic pre-handshake reassembly in default SNI parsing"}