CVE-2026-32952: Microsoft Go-Ntlmssp

High severity, CVSS 7.5. EPSS: 1.5% chance of exploitation in the next 30 days.

go-ntlmssp is a Go package that provides NTLM/Negotiate authentication over HTTP. Prior to version 0.1.1, a malicious NTLM challenge message can causes an slice out of bounds panic, which can crash any Go process using `ntlmssp.Negotiator` as an HTTP transport. Version 0.1.1 patches the issue.

Affected products

• Microsoft Go-Ntlmssp: before 0.1.1 (fixed in 0.1.1)

Published 2026-04-24. Last modified 2026-06-17.