CVE-2026-5402

high

Description

TLS protocol dissector heap overflow in Wireshark 4.6.0 to 4.6.4 allows denial of service and possible code execution

References

https://www.wireshark.org/security/wnpa-sec-2026-14.html

https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-5402.json

https://gitlab.com/wireshark/wireshark/-/issues/21090

https://bugzilla.redhat.com/show_bug.cgi?id=2464038

https://access.redhat.com/security/cve/CVE-2026-5402

Details

Source: Mitre, NVD

Published: 2026-04-30

Updated: 2026-06-30

Risk Information

CVSS v2

Base Score: 5

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

Severity: Medium

CVSS v3

Base Score: 8.8

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Severity: High

EPSS

EPSS: 0.00045