CVE-2026-100665

highpriority · track · 30EPSS 0.004 · 30 %ileDEFR

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.37% (30th) EPSS

CVSS 7.5 · high

Is it mine?

8 products

Check your exposure

Who says so?

2 sources

cert_bund · certfr

EPSS · scored 2026-10-28

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.

cvss

Technical severity, 0–10. One row per scoring source.

8.7

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.6–8.7

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nprimary · disclosure@vulncheck.comexploitability 3.9 · impact 3.6

v4.08.7highCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Xsecondary · disclosure@vulncheck.com

v4.06.6mediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Xsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: poc · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-295US

affected products (8)

Products and version ranges known to be affected.

IBM SPSS Analytic Serverall versionscert_bundDEcpe:/a:ibm:spss:analytic_server
Red Hat Enterprise Linuxall versionscert_bundDEcpe:/o:redhat:enterprise_linux:-
SUSE Linuxall versionscert_bundDEcpe:/o:suse:suse_linux:-
SUSE openSUSEall versionscert_bundDEcpe:/o:suse:opensuse:-
Open Source Netty< 4.1.138.Finalcert_bundDE
Open Source Netty< 4.2.18.Finalcert_bundDE
Open Source Open Source Netty <4.1.138.Final< 4.1.138.Finalcert_bundDE
Open Source Open Source Netty <4.2.18.Final< 4.2.18.Finalcert_bundDE

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-3291Netty: Mehrere SchwachstellenDeutsch2026-09-09csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Netty ausnutzen, um Denial-of-Service-Zustände zu verursachen, Sicherheitsmaßnahmen zu umgehen, Request- oder Response-Smuggling durchzuführen sowie Daten offenzulegen oder zu manipulieren.
CERTFR-2026-AVI-1385Multiples vulnérabilités dans les produits VMwareFrançais2026-10-26vendor · certfrFR

sources

Which sources assert this record, and when.

cert_bund certfr NVD CVE.org MITRE

published 2026-09-26modified 2026-10-02

references (4) nvd

External citations — patches, advisories, analysis.

scry

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