{"schema":"threatline.record/2","record":{"id":"CVE-2026-116542","aliases":["GHSA-2784-hxmm-4hgf"],"summary":"Netty netty-tcnative before 2.0.84.Final SNI Hostname Spoofing via Modified UTF-8 Decoding","details":"Netty netty-tcnative before 2.0.84.Final contains an SNI hostname spoofing vulnerability that allows remote unauthenticated clients to alter hostnames via JNI NewStringUTF decoding. Attackers can send overlong encodings like 0xC0 0x80 in the ClientHello server_name to confuse SNI-based certificate selection, access decisions, and logging.","categories":["Frameworks"],"product":"netty-tcnative","vendor":"netty","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-116542","source_modified_at":"2026-10-26T14:59:41.528Z","fetched_at":"2026-10-26T19:10:57.178988Z","product":"netty-tcnative","vendor":"netty","versions":[{"version":"0","lessThan":"2.0.84.Final","status":"affected","versionType":"custom"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-116542","source_modified_at":"2026-10-26T14:59:41.528Z","fetched_at":"2026-10-26T19:10:57.178988Z","product":"netty-tcnative-boringssl-static","vendor":"netty","versions":[{"version":"0","lessThan":"2.0.84.Final","status":"affected","versionType":"custom"}],"defaultStatus":"unaffected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-116542","source_modified_at":"2026-10-26T14:59:41.528Z","fetched_at":"2026-10-26T19:10:57.178988Z","package":{"name":"netty-tcnative","ecosystem":null},"version":"2.0.84.Final","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-116542","source_modified_at":"2026-10-26T14:59:41.528Z","fetched_at":"2026-10-26T19:10:57.178988Z","package":{"name":"netty-tcnative-boringssl-static","ecosystem":null},"version":"2.0.84.Final","basis":"first unaffected version stated in the CVE record"}],"cvss":6.9,"severity":"Medium","kev":{"listed":false},"epss":{"probability":null,"percentile":null,"score_date":null},"published_at":"2026-10-26T14:59:41.528Z","modified_at":"2026-10-26T14:59:41.528Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-116542","fetched_at":"2026-10-26T19:10:57.178988Z","source_modified_at":"2026-10-26T14:59:41.528Z"}],"sources":["CVE List"],"references":[{"source":"CVE List","url":"https://github.com/netty/netty-tcnative/security/advisories/GHSA-2784-hxmm-4hgf","tags":["vendor-advisory"]},{"source":"CVE List","url":"https://github.com/netty/netty-tcnative/commit/a879c85b9776cf478aada3ca69e60b8c0a99ed38","tags":["patch"]},{"source":"CVE List","url":"https://github.com/netty/netty-tcnative/blob/netty-tcnative-parent-2.0.83.Final/openssl-dynamic/src/main/c/sslcontext.c#L2608","tags":["technical-description"]},{"source":"CVE List","url":"https://github.com/netty/netty-tcnative/releases/tag/netty-tcnative-parent-2.0.84.Final","tags":["release-notes"]},{"source":"CVE List","url":"https://github.com/netty/netty-tcnative","tags":["product"]},{"source":"CVE List","url":"https://www.vulncheck.com/advisories/netty-netty-tcnative-before-2.0.84-final-sni-hostname-spoofing-via-modified-utf-8-decoding","tags":["third-party-advisory"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-26T14:59:41.528Z","content_hash":"667d23e697414b86655e89375e6ddb2dca6f0c2ea25239b988cfd3dfe374a472"}}