CVE-2026-33811

HIGH SEVERITY

CVSS Score & Metrics

Base Score

7.5 / 10

Vector String

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

When using LookupCNAME with the cgo DNS resolver, a very long CNAME response can trigger a double-free of C memory and a crash.

Published Date

May 07, 2026

Last Modified

May 12, 2026

CWE ID

CWE-415

Source

NVD

Vendor

Go standard library

Product

net