Bug 2560876 (CVE-2026-116542) - CVE-2026-116542 io.netty/netty-tcnative: netty-tcnative: Hostname spoofing via improper SNI character decoding
Summary: CVE-2026-116542 io.netty/netty-tcnative: netty-tcnative: Hostname spoofing vi...
Keywords:
Status: NEW
Alias: CVE-2026-116542
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-10-26 15:31 UTC by OSIDB Bzimport
Modified: 2026-11-03 18:39 UTC (History)
10 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-10-26 15:31:43 UTC 
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.
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