CVE-2026-33811

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CVSS 3.1

7.5 high

EPSS

<1%p55

Published

May 7, 2026 (May 7, 2026)

Modified

Sep 15, 2026

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.

Vendors: golang
Products: go
Weakness: CWE-415, CWE-1341
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

NVD CVE.org GitHub PoCs EPSS (0.8%)

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