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Undertow core could let attackers execute code
published 1 month ago
Summary
Several Undertow components – including karaf, benchmarks, core, dist, and examples – contain a security weakness that may allow an attacker to run unauthorized code. This could affect the safety of the applications that use these libraries. Install the updated version 2.0.26.Final‑tuxcare.1 to resolve the issue.
What to do
- Update undertow io.undertow:karaf to version 2.0.26.Final-tuxcare.1.
- Update undertow io.undertow:undertow-benchmarks to version 2.0.26.Final-tuxcare.1.
- Update undertow io.undertow:undertow-core to version 2.0.26.Final-tuxcare.1.
- Update undertow io.undertow:undertow-dist to version 2.0.26.Final-tuxcare.1.
- Update undertow io.undertow:undertow-examples to version 2.0.26.Final-tuxcare.1.
- Update undertow io.undertow:undertow-parent to version 2.0.26.Final-tuxcare.1.
- Update undertow io.undertow:undertow-parser-generator to version 2.0.26.Final-tuxcare.1.
- Update undertow io.undertow:undertow-servlet to version 2.0.26.Final-tuxcare.1.
- Update undertow io.undertow:undertow-websockets-jsr to version 2.0.26.Final-tuxcare.1.
- Update io.undertow:karaf to version 2.0.26.Final-tuxcare.1.
- Update io.undertow:undertow-benchmarks to version 2.0.26.Final-tuxcare.1.
- Update io.undertow:undertow-core to version 2.0.26.Final-tuxcare.1.
- Update io.undertow:undertow-examples to version 2.0.26.Final-tuxcare.1.
- Update io.undertow:undertow-servlet to version 2.0.26.Final-tuxcare.1.
- Update io.undertow:undertow-websockets-jsr to version 2.0.26.Final-tuxcare.1.
Affected software
| Ecosystem | Vendor | Product | Affected versions |
|---|---|---|---|
| TuxCare:Maven | undertow | io.undertow:karaf |
< 2.0.26.Final-tuxcare.1 Fix: upgrade to 2.0.26.Final-tuxcare.1
|
| TuxCare:Maven | undertow | io.undertow:undertow-benchmarks |
< 2.0.26.Final-tuxcare.1 Fix: upgrade to 2.0.26.Final-tuxcare.1
|
| TuxCare:Maven | undertow | io.undertow:undertow-core |
< 2.0.26.Final-tuxcare.1 Fix: upgrade to 2.0.26.Final-tuxcare.1
|
| TuxCare:Maven | undertow | io.undertow:undertow-dist |
< 2.0.26.Final-tuxcare.1 Fix: upgrade to 2.0.26.Final-tuxcare.1
|
| TuxCare:Maven | undertow | io.undertow:undertow-examples |
< 2.0.26.Final-tuxcare.1 Fix: upgrade to 2.0.26.Final-tuxcare.1
|
| TuxCare:Maven | undertow | io.undertow:undertow-parent |
< 2.0.26.Final-tuxcare.1 Fix: upgrade to 2.0.26.Final-tuxcare.1
|
| TuxCare:Maven | undertow | io.undertow:undertow-parser-generator |
< 2.0.26.Final-tuxcare.1 Fix: upgrade to 2.0.26.Final-tuxcare.1
|
| TuxCare:Maven | undertow | io.undertow:undertow-servlet |
< 2.0.26.Final-tuxcare.1 Fix: upgrade to 2.0.26.Final-tuxcare.1
|
| TuxCare:Maven | undertow | io.undertow:undertow-websockets-jsr |
< 2.0.26.Final-tuxcare.1 Fix: upgrade to 2.0.26.Final-tuxcare.1
|
| TuxCare:Maven | – | io.undertow:karaf |
>= 2.0.26.Final, < 2.0.26.Final-tuxcare.1 Fix: upgrade to 2.0.26.Final-tuxcare.1
|
| TuxCare:Maven | – | io.undertow:undertow-benchmarks |
>= 2.0.26.Final, < 2.0.26.Final-tuxcare.1 Fix: upgrade to 2.0.26.Final-tuxcare.1
|
| TuxCare:Maven | – | io.undertow:undertow-core |
>= 2.0.26.Final, < 2.0.26.Final-tuxcare.1 Fix: upgrade to 2.0.26.Final-tuxcare.1
|
| TuxCare:Maven | – | io.undertow:undertow-examples |
>= 2.0.26.Final, < 2.0.26.Final-tuxcare.1 Fix: upgrade to 2.0.26.Final-tuxcare.1
|
| TuxCare:Maven | – | io.undertow:undertow-servlet |
>= 2.0.26.Final, < 2.0.26.Final-tuxcare.1 Fix: upgrade to 2.0.26.Final-tuxcare.1
|
| TuxCare:Maven | – | io.undertow:undertow-websockets-jsr |
>= 2.0.26.Final, < 2.0.26.Final-tuxcare.1 Fix: upgrade to 2.0.26.Final-tuxcare.1
|
Original advisory text
TuxCare security update for io.undertow:undertow-core (1 CVE)
TuxCare rebuilt io.undertow:undertow-core to address 1 CVE. Fixed in 2.0.26.Final-tuxcare.1.
Timeline
Published15 Sep 2026
Updated2 Nov 2026
First seen15 Sep 2026
Sources
CLSA-2026-1789457514 · OSV
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