CVE-2026-32952
go-ntlmssp NTLM challenges can panic on malformed payloads
In short
The go-ntlmssp package can crash when it receives a specially crafted NTLM authentication message. An attacker can exploit this to disable services that use this library for authentication.
Technical detail
A malformed NTLM challenge message triggers an out-of-bounds slice access in ntlmssp.Negotiator, causing a panic that crashes the Go process. The attack requires network access to send a malicious challenge during NTLM authentication handshake; no authentication is required beforehand. The impact is denial of service affecting any application using this library for HTTP authentication.
Summary generated and translated by AI from the official description.
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Affected products
Azure · go-ntlmsspWant to know if your infrastructure is exposed to this?
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