Netty versions from 4.2.11.Final before 4.2.18.Final contain an incomplete hostname verification fix in the QUIC certificate verification path when using a plain X509TrustManager. The BoringSSLCertificateVerifyCallback discards the SSLEngine for plain trust managers, preventing endpoint identification from running even when HTTPS verification is configured. Attackers on the network path can present a certificate chain for the wrong hostname that the plain trust manager accepts, bypassing hostname authentication for QUIC clients.
Metrics
Affected Vendors & Products
References
History
Fri, 02 Oct 2026 16:30:00 +0000
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ssvc
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Sun, 27 Sep 2026 12:15:00 +0000
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threat_severity
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threat_severity
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Sat, 26 Sep 2026 13:30:00 +0000
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| Description | Netty versions from 4.2.11.Final before 4.2.18.Final contain an incomplete hostname verification fix in the QUIC certificate verification path when using a plain X509TrustManager. The BoringSSLCertificateVerifyCallback discards the SSLEngine for plain trust managers, preventing endpoint identification from running even when HTTPS verification is configured. Attackers on the network path can present a certificate chain for the wrong hostname that the plain trust manager accepts, bypassing hostname authentication for QUIC clients. | |
| Title | Netty 4.2.11 through 4.2.17 QUIC Hostname Verification Bypass | |
| First Time appeared |
Netty
Netty netty |
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| Weaknesses | CWE-295 | |
| CPEs | cpe:2.3:a:netty:netty:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Netty
Netty netty |
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| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: VulnCheck
Published: 2026-09-26T13:23:31.242Z
Updated: 2026-10-02T15:46:37.467Z
Reserved: 2026-09-26T02:33:59.039Z
Link: CVE-2026-100665
Updated: 2026-10-02T15:45:45.856Z
Status : Deferred
Published: 2026-09-26T14:16:49.677
Modified: 2026-10-02T16:16:41.803
Link: CVE-2026-100665