CVE-2026-33811

Medium

Elevated severity or exploit probability.

CVSS base

7.5 HIGH

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

EPSS — probability of exploitation (30 days)

0.9%

57.3th percentile

CISA KEV

Not listed

Weakness / dates

CWE-1341

Published 2026-05-07 · modified 2026-09-18

Description

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

golang

Official: NVD · CVE.org