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Fencer Vulns
medium 5.3

CVE-2026-32952 json

go-ntlmssp NTLM challenges can panic on malformed payloads

published 2026-04-23 6 mo ago modified 2026-10-26 13 d ago also GHSA-pjcq-xvwq-hhpj , GO-2026-5543 , EUVD-2026-25374

cvss
5.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.0%
EPSS 1.0% chance of exploitation in 30 days, percentile 63%
public exploits
0
none known

Summary

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.

Patch / fix

  • go github.com/Azure/go-ntlmssp 0.1.1
  • microsoft go-ntlmssp 0.1.1
  • govulncheck-vulndb SLES 16.0, SLES for SAP applications 16.0 0.0.20260727T201416-160000.1.1

suse advisories SUSE-SU-2026:23216-1SUSE-SU-2026:23227-1

  • govulncheck-vulndb openSUSE Leap 16.0 0.0.20260727T201416-160000.1.1
  • rclone openSUSE Leap 16.0 1.74.4-bp160.1.1
  • cmctl openSUSE Tumbleweed 2.5.0-1.1
  • rclone openSUSE Tumbleweed 1.74.0-1.1

opensuse advisories openSUSE-SU-2026:21551-1openSUSE-SU-2026:21436-1openSUSE-SU-2026:10672-1openSUSE-SU-2026:10682-1

  • rclone Alpine 3.24 1.74.0-r0

alpine advisories ALPINE-CVE-2026-32952

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-32952 updated cvss 5.3

go-ntlmssp: go-ntlmssp: Denial of Service via malicious NTLM challenge

  • Red Hat Assisted Installer for Red Hat OpenShift Container Platform 2 assisted/agent-preinstall-image-builder-rhel9 Red Hat Confidential Compute Attestation openshift-sandboxed-containers/osc-must-gather-rhel9 Red Hat Kernel Module Management Operator for Red Hat Openshift kmm/kernel-module-management-must-gather-rhel9 Red Hat Logging Subsystem for Red Hat OpenShift openshift-logging/cluster-logging-rhel9-operator Red Hat Logical Volume Manager Storage lvms4/lvms-must-gather-rhel9 Red Hat Migration Toolkit for Containers rhmtc/openshift-migration-log-reader-rhel8, rhmtc/openshift-migration-must-gather-rhel8
    +21 more products
    Red Hat Migration Toolkit for Virtualization mtv-candidate/mtv-must-gather-rhel8, migration-toolkit-virtualization/mtv-must-gather-rhel8 Red Hat Multicluster Engine for Kubernetes multicluster-engine/must-gather-rhel9 Red Hat Multicluster Global Hub multicluster-globalhub/multicluster-globalhub-grafana-rhel8, multicluster-globalhub/multicluster-globalhub-grafana-rhel9 Red Hat Node HealthCheck Operator workload-availability/node-healthcheck-must-gather-rhel9 Red Hat OpenShift API for Data Protection oadp/oadp-mustgather-rhel9 Red Hat OpenShift Developer Tools and Services ocp-tools-4/jenkins-rhel8, ocp-tools-4/jenkins-rhel9, ocp-tools-4/jenkins-agent-base-rhel8, ocp-tools-4/jenkins-agent-base-rhel9 Red Hat OpenShift Serverless openshift-serverless-1/serverless-must-gather-rhel9 Red Hat OpenShift Service Mesh 2 openshift-service-mesh/istio-must-gather-rhel9 Red Hat OpenShift Service Mesh 3 openshift-service-mesh/istio-must-gather-rhel9 Red Hat Pen Drive Powered by Red Hat Lightspeed pen-drive/pen-drive-scanner-rhel9 Red Hat Power monitoring for Red Hat OpenShift openshift-power-monitoring/power-monitoring-rhel9-operator Red Hat Advanced Cluster Management for Kubernetes 2 rhacm2/volsync-rhel9, rhacm2/acm-grafana-rhel9, rhacm2/acm-must-gather-rhel9 Red Hat Build of Kueue kueue/kueue-must-gather-rhel9 Red Hat Enterprise Linux 9 grafana, grafana-selinux Red Hat Enterprise Linux 10 grafana Red Hat OpenShift AI (RHOAI) rhoai/rhai-cli-rhel9, rhoai/odh-must-gather-rhel9, rhoai/odh-pipeline-runtime-minimal-cpu-py312-rhel9, rhoai/odh-pipeline-runtime-pytorch-cuda-py312-rhel9, rhoai/odh-pipeline-runtime-pytorch-rocm-py312-rhel9, rhoai/odh-workbench-jupyter-minimal-cpu-py312-rhel9, +14 more Red Hat OpenShift Container Platform 4 openshift, microshift, microshift-olm, microshift-sriov, microshift-multus, openshift-clients, +52 more Red Hat Openshift Data Foundation 4 odf4/mcg-core-rhel9, odf4/odf-must-gather-rhel9, odf4/odf-cloudnative-pg-rhel9-operator Red Hat OpenShift GitOps openshift-gitops-1/dex-rhel8, openshift-gitops-1/dex-rhel9, openshift-gitops-1/must-gather-rhel8, openshift-gitops-1/must-gather-rhel9 Red Hat OpenStack Platform 18.0 rhoso-operators/openstack-operator-bundle, rhoso-operators/rabbitmq-cluster-rhel9-operator Red Hat Quay 3 quay/quay-rhel8, quay/quay-rhel9, quay/quay-operator-rhel8, quay/quay-operator-rhel9
    under investigation
  • Red Hat cert-manager Operator for Red Hat OpenShift cert-manager/jetstack-cert-manager-rhel9, cert-manager/cert-manager-istio-csr-rhel9, cert-manager/jetstack-cert-manager-acmesolver-rhel9 Red Hat External Secrets Operator for Red Hat OpenShift external-secrets-operator/external-secrets-rhel9, external-secrets-operator/bitwarden-sdk-server-rhel9, external-secrets-operator/external-secrets-operator-rhel9, external-secrets-operator/external-secrets-operator-bundle Red Hat Ansible Automation Platform 2 ansible-automation-platform-24/aap-must-gather-rhel8, ansible-automation-platform-25/aap-must-gather-rhel8, ansible-automation-platform-26/aap-must-gather-rhel9 Red Hat Ceph Storage 5 rhceph/rhceph-5-dashboard-rhel8 Red Hat Ceph Storage 6 rhceph/rhceph-6-dashboard-rhel9 Red Hat Ceph Storage 9 rhceph/grafana-rhel10
    +1 more products
    Red Hat OpenShift Virtualization 4 container-native-virtualization/cnv-must-gather-rhel8, container-native-virtualization/cnv-must-gather-rhel9
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
6 mo ago

Exploit prediction

1.03% chance of exploitation in the next 30 days, higher than 63% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
GitHub 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Affected packages

ecosystem package affected fixed in
go github.com/Azure/go-ntlmssp
<0.1.1
0.1.1

Affected products

  • Azure go-ntlmssp

Classification

Weakness
  • CWE-190 Integer Overflow or Wraparound

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.