The current version of Undertow is 2.4.1.Final (as of 20/05/2026). patchletter checks the official source daily and emails you new releases.
BSI security advisories
Advisories the German BSI (CERT-Bund) published for this product. Whether your version is affected is stated in the advisory itself.
- Red Hat Undertow: Schwachstelle ermöglicht Denial of Service
WID-SEC-W-2026-3099 · 31 Aug
- Red Hat Undertow: Schwachstelle ermöglicht Denial of Service
WID-SEC-W-2026-3059 · 28 Aug
- Red Hat Undertow: Schwachstelle ermöglicht Manipulation von Dateien
WID-SEC-W-2026-2862 · 17 Aug
- Red Hat Undertow: Mehrere Schwachstellen ermöglichen Umgehung von Sicherheitsmaßnahmen
WID-SEC-W-2026-0907 · 11 Jun
Version history & changelog · as detected by patchletter
| Version | Channel | Date | Notes |
|---|---|---|---|
| 2.4.1.Final | STABLE | 20/05/2026 | Release notes → |
| 2.4.0.Final | STABLE | 20/05/2026 | Release notes → |
| 2.4.0.Beta1 | BETA | 18/02/2026 | Release notes → |
| 2.4.0.Alpha1 | BETA | 27/10/2025 | Release notes → |
| 2.3.23.Final | STABLE | 05/02/2026 | Release notes → |
| 2.3.22.Final | STABLE | 23/01/2026 | Release notes → |
| 2.3.21.Final | STABLE | 13/01/2026 | Release notes → |
| 2.3.20.Final | STABLE | 10/10/2025 | Release notes → |
| 2.3.19.Final | STABLE | 10/10/2025 | Release notes → |
| 2.3.18.Final | STABLE | 19/10/2024 | Release notes → |
| 2.3.17.Final | STABLE | 04/10/2024 | Release notes → |
| 2.3.16.Final | STABLE | 22/08/2024 | Release notes → |
| 2.3.14.Final | STABLE | 20/06/2024 | Release notes → |
| 2.2.39.Final | STABLE | 05/02/2026 | Release notes → |
| 2.2.38.Final | STABLE | 12/10/2025 | Release notes → |
| 2.2.37.Final | STABLE | 19/10/2024 | Release notes → |
| 2.2.36.Final | STABLE | 04/10/2024 | Release notes → |
| 2.2.35.Final | STABLE | 22/08/2024 | Release notes → |
| 2.2.34.Final | STABLE | 14/08/2024 | Release notes → |
| 2.2.33.Final | STABLE | 23/06/2024 | Release notes → |
Frequently asked questions
- What is the latest version of Undertow?
- Undertow 2.4.1.Final, released 20/05/2026. patchletter checks the vendor's official source daily for new releases.
- Where can I find the Undertow release notes?
- The version history above links to the vendor's official release notes where the vendor publishes them. patchletter deliberately stores no vendor full texts.
- How do I get notified about new Undertow updates?
- Tick Undertow off in the catalogue and leave your address. From then on new versions go out by email — one at a time, or bundled in the daily or weekly digest.
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[](https://patchletter.com/en/software/undertow)https://patchletter.com/badge/undertow.svgAlso available: ?v=eol (end of support) and ?v=cve (actively exploited).
