Is CVE-2026-34956 actively exploited?

No active exploitation of CVE-2026-34956 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-34956 be exploited remotely?

Yes. CVE-2026-34956 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-34956?

CVE-2026-34956 has a CVSS score of 5.9 (MEDIUM).

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MEDIUM

CVE-2026-34956

CWE-120Published: May 5, 2026· Updated: May 5, 2026

5.9

CVSS v3.1

EPSS:0.10%probability of exploitation in 30 daysPercentile:26.6th

Official Description

A flaw was found in Open vSwitch. When Open vSwitch is configured with a conntrack flow using FTP helpers over the userspace datapath, a remote attacker can send a specially crafted FTP stream with an EPASV command exceeding 255 characters. This heap access error can lead to a crash, resulting in a Denial of Service (DoS) for the affected system.

NVD Source

Technical Analysis

CVE-2026-34956 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 5.9.