Is there a public exploit for CVE-2026-34956?

No public exploit for CVE-2026-34956 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-34956?

CVE-2026-34956 scores CVSS 5.9 (v3.1), rated medium. EPSS puts the chance of exploitation in the next 30 days at 0.41%.

5.9 Medium

A flaw was found in Open vSwitch.

CVE-2026-34956

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.

Assessment

CVSS: 5.9 (v3.1)
Severity: Medium
EPSS: 0.41% chance of exploitation in the next 30 days
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 5 May 2026
Last updated: 2 November 2026
Assigner: redhat

CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

At the source

EUVD (ENISA)

References

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