What is CVE-2026-76889?

CVE-2026-76889 is a medium-severity vulnerability in Wireshark Foundation, classified under Heap-based Buffer Overflow. CVSS score: 4.7/10. Published 2026-08-19.

How severe is CVE-2026-76889?

Medium severity. CVSS v3 base score is 4.7 out of 10.

Buffer overflow in Wireshark Foundation

CVE-2026-76889

UMTS FP 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 4.7 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H.

Affected products

Wireshark Foundation

Weakness classification (CWE)

CWE-122 — Heap-based Buffer Overflow

References

cve@gitlab.com
cve@gitlab.com

Frequently asked questions

What is CVE-2026-76889?: CVE-2026-76889 is a medium-severity vulnerability in Wireshark Foundation, classified under Heap-based Buffer Overflow. CVSS score: 4.7/10. Published 2026-08-19.
How severe is CVE-2026-76889?: Medium severity. CVSS v3 base score is 4.7 out of 10.