Denial of Service Vulnerability in Wireshark's X.509IF Protocol Dissector
CVE-2026-76928

7.5HIGH

Key Information:

Vendor

Wireshark
Status
Wireshark
Vendor
CVE Published:
19 August 2026

What is CVE-2026-76928?

A vulnerability in the X.509IF protocol dissector of Wireshark, affecting versions from 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18, could allow an attacker to cause a denial of service. Specifically, this flaw leads to a crash that could interrupt network analysis operations. Users are urged to update their software to mitigate this issue and ensure continued network safety.

Affected Version(s)

Wireshark 4.6.0 < 4.6.8

Wireshark 4.4.0 < 4.4.18

References

https://www.wireshark.org/security/wnpa-sec-2026-87.html
https://gitlab.com/wireshark/wireshark/-/work_items/21469

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Aisle Research (Dmitrijs Trizna, Luigino Camastra, Ze Sheng (O2Lab & TAMU), Igor Morgenstern)
.