What is CVE-2026-76886?

CVE-2026-76886 is a high-severity vulnerability in Wireshark Foundation, classified under Heap-based Buffer Overflow. CVSS score: 8.1/10. Published 2026-08-19.

How severe is CVE-2026-76886?

High severity. CVSS v3 base score is 8.1 out of 10.

Buffer overflow in Wireshark Foundation

CVE-2026-76886

C12.22 protocol dissector crash in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Wireshark Foundation

Weakness classification (CWE)

CWE-122 — Heap-based Buffer Overflow

References

cve@gitlab.com
cve@gitlab.com
134c704f-9b21-4f2e-91b3-4a467353bcc0

Frequently asked questions

What is CVE-2026-76886?: CVE-2026-76886 is a high-severity vulnerability in Wireshark Foundation, classified under Heap-based Buffer Overflow. CVSS score: 8.1/10. Published 2026-08-19.
How severe is CVE-2026-76886?: High severity. CVSS v3 base score is 8.1 out of 10.