Denial of Service Vulnerability in Wireshark's OpenFlow v6 Protocol Dissector
CVE-2026-6520

5.5MEDIUM

Key Information:

Vendor

Wireshark
Status
Wireshark
Vendor
CVE Published:
30 April 2026

What is CVE-2026-6520?

The Wireshark application, specifically versions 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14, contains a vulnerability within its OpenFlow v6 protocol dissector. This flaw can trigger an infinite loop, leading to a denial of service condition. Exploitation of this vulnerability can render the application unresponsive, impacting network analysis and monitoring capabilities. Users should update to secure versions to mitigate potential risks.

Affected Version(s)

Wireshark 4.6.0 < 4.6.5

Wireshark 4.4.0 < 4.4.15

References

https://www.wireshark.org/security/wnpa-sec-2026-40.html
https://gitlab.com/wireshark/wireshark/-/work_items/21181

CVSS V3.1

Score:
5.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Sharon Brizinov
.