Is CVE-2026-33871 actively exploited?

No active exploitation of CVE-2026-33871 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-33871 be exploited remotely?

Yes. CVE-2026-33871 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-33871?

CVE-2026-33871 has a CVSS score of 7.5 (HIGH).

HOME VULNERABILITIESCVE-2026-33871

HIGH

CVE-2026-33871

CWE-770Published: March 27, 2026· Updated: Mar 30, 2026

7.5

CVSS v3.1

EPSS:0.06%probability of exploitation in 30 daysPercentile:19.3th

Official Description

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.

NVD Source

Technical Analysis

CVE-2026-33871 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.