.. _vulnerabilityManagement_securityAdvisory_2026_CVE-2026-33871:

CVE-2026-33871
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Data: 2026-04-02

Severity: High

CVSS Score:  7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N)

Riferimenti:  

- `https://nvd.nist.gov/vuln/detail/CVE-2026-33871 <https://nvd.nist.gov/vuln/detail/CVE-2026-33871>`_
- `https://ossindex.sonatype.org/vulnerability/CVE-2026-33871 <https://ossindex.sonatype.org/vulnerability/CVE-2026-33871>`_
- `https://github.com/netty/netty/security/advisories/GHSA-w9fj-cfpg-grvv <https://github.com/netty/netty/security/advisories/GHSA-w9fj-cfpg-grvv>`_

Libreria: io.netty:netty-transport <= 4.1.132.Final e <= 4.2.10.Final

**Descrizione**

CWE-770: Allocation of Resources Without Limits or Throttling

Netty is an asynchronous, event-driven network application framework. In versions prior to 4.1.132.Final and 4.2.10.Final, a remote user can trigger a Denial of Service (DoS) against a Netty HTTP/2 server by sending a flood of `CONTINUATION` frames. The server's lack of a limit on the number of `CONTINUATION` frames, combined with a bypass of existing size-based mitigations using zero-byte frames, allows an user to cause excessive CPU consumption with minimal bandwidth, rendering the server unresponsive. Versions 4.1.132.Final and 4.2.10.Final fix the issue.

**GovWay**

Versione affette:

- 3.3.x: <= 3.3.19.p1
- 3.4.x: <= 3.4.2.p1

Risoluzione:

- 3.3.x: 3.3.20
- 3.4.x: 3.4.3