Netty: Mehrere Schwachstellen
WID-SEC-2026-1814 · first 08.06.2026 · updated 26.10.2026 · CVSS 8,7
What it is about
Netty ist ein asynchrones, ereignisgesteuertes Netzwerk-Anwendungs-Framework für die schnelle Entwicklung von wartbaren, hochleistungsfähigen Protokollservern und -clients. Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Netty ausnutzen, um Sicherheitsvorkehrungen zu umgehen, Daten zu manipulieren, vertrauliche Informationen offenzulegen oder einen Denial-of-Service-Zustand herbeizuführen.
Under what conditions?
Over the network and without logging in. This is the most dangerous combination: attackers can scan reachable devices automatically.
What can happen in the worst case
An attacker could use the vulnerability to
- Sicherheitsvorkehrungen zu umgehen
- Daten zu manipulieren
- vertrauliche Informationen offenzulegen oder einen Denial-of-Service-Zustand herbeizuführen
Am I affected?
Affected according to the BSI:
- Red Hat Enterprise Linux
- SUSE Linux
- IBM Operational Decision Manager
- IBM SPSS Analytic Server
- IBM Storage Scale
- IBM License Metric Tool
- IBM App Connect Enterprise
- IBM Sterling Connect:Direct
- IBM DB2
- Open Source Netty <4.2.15.Final
- Open Source Netty <4.1.135.Final
- Ubuntu Linux
and 4 more
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Update to at least:
- Open Source Netty 4.2.15.Final
- Open Source Netty 4.1.135.Final
- IBM Cognos Analytics 12.1.3 FP2
- IBM Cognos Analytics 12.0.4 FP3
- IBM Concert 3.0.1.1
Is the vulnerability already being exploited?
None of the CVEs is in the CISA catalogue of exploited vulnerabilities. That does not mean there are no attacks, only that none are documented.
Information and sources
- Original BSI advisory (WID)
- Red Hat Security Advisory RHSA-2026:34608 vom 2026-07-02 access.redhat.com
- Netty Security Advisories vom 2026-06-07 github.com
- GitHub Security Advisory GHSA-3244-j874-rhc2 vom 2026-06-07 github.com
- GitHub Security Advisory GHSA-4grm-h2qv-h6w6 vom 2026-06-07 github.com
- GitHub Security Advisory GHSA-5pvg-856g-cp85 vom 2026-06-07 github.com
- GitHub Security Advisory GHSA-5w86-c3rq-vjj7 vom 2026-06-07 github.com
- GitHub Security Advisory GHSA-5x3r-wrvg-rp6q vom 2026-06-07 github.com
- GitHub Security Advisory GHSA-5xrh-qmmq-w6ch vom 2026-06-07 github.com
- GitHub Security Advisory GHSA-676x-f7gg-47vc vom 2026-06-07 github.com
- GitHub Security Advisory GHSA-6ghj-frrj-jjj3 vom 2026-06-07 github.com
- GitHub Security Advisory GHSA-6jv9-x5w9-2ccm vom 2026-06-07 github.com
- GitHub Security Advisory GHSA-c2gf-v879-257j vom 2026-06-07 github.com
- GitHub Security Advisory GHSA-c2rx-5r8w-8xr2 vom 2026-06-07 github.com
- GitHub Security Advisory GHSA-c653-97m9-rcg9 vom 2026-06-07 github.com
- GitHub Security Advisory GHSA-cc37-9q2j-3hfv vom 2026-06-07 github.com
- GitHub Security Advisory GHSA-cmm3-54f8-px4j vom 2026-06-07 github.com
- GitHub Security Advisory GHSA-cq4q-cv5g-r8q5 vom 2026-06-07 github.com
- GitHub Security Advisory GHSA-h2qv-fj59-j46j vom 2026-06-07 github.com
- GitHub Security Advisory GHSA-hvcg-qmg6-jm4c vom 2026-06-07 github.com
- GitHub Security Advisory GHSA-w573-9ffj-6ff9 vom 2026-06-07 github.com
- GitHub Security Advisory GHSA-x4gw-5cx5-pgmh vom 2026-06-07 github.com
- GitHub Security Advisory GHSA-xmv7-r254-6q78 vom 2026-06-07 github.com
- GitHub Security Advisory GHSA-xmv7-r254-6q78 vom 2026-06-07 github.com
- Netty Security Advisories vom 2026-06-07 github.com
- Red Hat Security Advisory RHSA-2026:26018 vom 2026-06-17 access.redhat.com
and 31 more sources in the original advisory
CVE: CVE-2026-44249, CVE-2026-44250, CVE-2026-44890, CVE-2026-44892, CVE-2026-44893, CVE-2026-44894, CVE-2026-45416, CVE-2026-45536, CVE-2026-45673, CVE-2026-45674, CVE-2026-46340, CVE-2026-47244, CVE-2026-47691, CVE-2026-48006, CVE-2026-48043, CVE-2026-48059, CVE-2026-48748, CVE-2026-50009, CVE-2026-50010, CVE-2026-50020 …
Source: BSI warning and information service (CERT-Bund); CISA. The assessment of the conditions is my reading of the BSI text; the external pages are in their original language.