What is CVE-2026-15165?

CVE-2026-15165 is a medium-severity vulnerability in Wireshark Foundation, classified under Heap-based Buffer Overflow. CVSS score: 5.5/10. Published 2026-07-08.

How severe is CVE-2026-15165?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Buffer overflow in Wireshark Foundation

CVE-2026-15165

TLS ECH decryptor crash in Wireshark 4.6.0 to 4.6.6 allows denial of service

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

Affected products

Wireshark Foundation — versions 4.6.0

Weakness classification (CWE)

CWE-122 — Heap-based Buffer Overflow

References

cve@gitlab.com
cve@gitlab.com

Frequently asked questions

What is CVE-2026-15165?: CVE-2026-15165 is a medium-severity vulnerability in Wireshark Foundation, classified under Heap-based Buffer Overflow. CVSS score: 5.5/10. Published 2026-07-08.
How severe is CVE-2026-15165?: Medium severity. CVSS v3 base score is 5.5 out of 10.