---
id: CVE-2026-32952
aliases:
  - GHSA-pjcq-xvwq-hhpj
  - GO-2026-5543
title: go-ntlmssp NTLM challenges can panic on malformed payloads
summary: go-ntlmssp NTLM challenges can panic on malformed payloads
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'
vendor: Azure
product: github.com/Azure/go-ntlmssp
ecosystem: go
affected:
  - github.com/Azure/go-ntlmssp < 0.1.1
patched:
  - github.com/Azure/go-ntlmssp 0.1.1
published: '2026-04-23'
updated: '2026-07-24'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-pjcq-xvwq-hhpj'
references:
  - url: >-
      https://github.com/Azure/go-ntlmssp/security/advisories/GHSA-pjcq-xvwq-hhpj
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-32952'
  - url: 'https://github.com/Azure/go-ntlmssp'
  - url: 'https://github.com/Azure/go-ntlmssp/releases/tag/v0.1.1'
tags:
  - osv
  - go
epss: 0.01467
epssPercentile: 0.72609
ingestedAt: '2026-07-25T19:08:11.764Z'
---

## Overview

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 packages

- `github.com/Azure/go-ntlmssp < 0.1.1`

## Remediation

Upgrade to a patched release:

- `github.com/Azure/go-ntlmssp 0.1.1`