Invoking key constraints not enforced in golang.org/x/crypto/ssh/agent
Priority MEDIUM 48CWE-862Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · None
- Fix status
- Partial Red Hat: 9 fixed, 77 without a fix
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-862.
Summary
The in-memory keyring returned by NewKeyring() silently accepted keys with the ConfirmBeforeUse constraint but never enforced it. The key would sign without any confirmation prompt, with no indication to the caller that the constraint was not in effect. NewKeyring() now returns an error when unsupported constraints are requested.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00469 40th percentileScored 2026-11-07
Fix Partial golang.org/x/crypto/ssh/agent (golang.org/x/crypto): 0.52.0golang.org/x/crypto (Go): 0.52.0Red Hat: 15 advisoriesRed Hat: 9 fixed, 77 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Go standard library | golang.org/x/crypto/ssh/agent | before 0.52.0 | 0.52.0 | Patch available | CNA |
| — | golang.org/x/crypto (Go) | before 0.52.0 | 0.52.0 | Patch available | GHSA-jppx-rxg9-jmrx |
- golang.org/x/crypto/ssh/agent VendorGo standard library Affected before 0.52.0 Fixed in 0.52.0 Patch available CNA
- golang.org/x/crypto (Go) Vendor— Affected before 0.52.0 Fixed in 0.52.0 Patch available GHSA-jppx-rxg9-jmrx
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:golang:crypto:*:*:*:*:*:go:*:* | before 0.52.0 | Vulnerable | Go standard library |
- cpe:2.3:a:golang:crypto:*:*:*:*:*:go:*:* Versions before 0.52.0 Vulnerable ·Go standard library
Remediation
- Fix · CNA golang.org/x/crypto/ssh/agent (golang.org/x/crypto) Fixed in 0.52.0
- Fix · GHSA-jppx-rxg9-jmrx golang.org/x/crypto (Go) Fixed in 0.52.0 Advisory →
Red Hat 15 advisories
- RHSA-2026:94498 Released 2026-11-03 · Red Hat rating ImportantRed Hat OpenShift API for Data Protection - 1.4.12
- OpenShift API for Data Protection 1.4 registry.redhat.io/oadp/oadp-cli-binaries-rhel9, registry.redhat.io/oadp/oadp-kubevirt-velero-plugin-rhel9, registry.redhat.io/oadp/oadp-mustgather-rhel9 +8
- RHSA-2026:82322 Released 2026-10-13 · Red Hat rating Importantcert-manager Operator for Red Hat OpenShift 1.17.2
- Cert Manager support for Red Hat OpenShift release 1.17 registry.redhat.io/cert-manager/cert-manager-operator-rhel9
- RHSA-2026:82304 Released 2026-10-13 · Red Hat rating Importantcert-manager Operator for Red Hat OpenShift 1.17.2
- Cert Manager support for Red Hat OpenShift release 1.17 registry.redhat.io/cert-manager/jetstack-cert-manager-acmesolver-rhel9, registry.redhat.io/cert-manager/jetstack-cert-manager-rhel9
Show 12 more Red Hat advisories
- RHSA-2026:66022 Released 2026-09-09 · Red Hat rating ImportantRed Hat OpenShift API for Data Protection
- OpenShift API for Data Protection 1.5 registry.redhat.io/oadp/oadp-kubevirt-velero-plugin-rhel9, registry.redhat.io/oadp/oadp-mustgather-rhel9, registry.redhat.io/oadp/oadp-rhel9-operator +4
- RHSA-2026:57194 Released 2026-08-19 · Red Hat rating Importantmulticluster engine for Kubernetes v2.11.5 security update
- multicluster engine for Kubernetes 2.11 registry.redhat.io/multicluster-engine/addon-manager-rhel9, registry.redhat.io/multicluster-engine/backplane-rhel9-operator, registry.redhat.io/multicluster-engine/cluster-api-provider-kubevirt-rhel9 +11
- RHSA-2026:50888 Released 2026-08-05 · Red Hat rating ImportantRHTAS 1.4.3 - CLI Stack Release
- Red Hat Trusted Artifact Signer 1.4 conforma-cli-stack-v1-4-1.4.3@amd64, conforma-cli-stack-v1-4-1.4.3@amd64_darwin, conforma-cli-stack-v1-4-1.4.3@amd64_windows +4
- RHSA-2026:49767 Released 2026-08-03 · Red Hat rating ImportantRHTAS 1.4.3 - CLI Stack Release
- Red Hat Trusted Artifact Signer 1.4 conforma-cli-stack-v1-4-1.4.3@amd64, conforma-cli-stack-v1-4-1.4.3@amd64_darwin, conforma-cli-stack-v1-4-1.4.3@amd64_windows +4
- RHSA-2026:48771 Released 2026-07-30 · Red Hat rating ImportantRHTAS 1.4.3 - CLI Stack Release
- Red Hat Trusted Artifact Signer 1.4 conforma-cli-stack-v1-4-1.4.3@amd64, conforma-cli-stack-v1-4-1.4.3@amd64_darwin, conforma-cli-stack-v1-4-1.4.3@amd64_windows +4
- RHSA-2026:43692 Released 2026-07-22 · Red Hat rating ImportantRed Hat OpenShift API for Data Protection
- OpenShift API for Data Protection 1.6 registry.redhat.io/oadp/oadp-velero-rhel9
- RHSA-2026:41036 Released 2026-07-16 · Red Hat rating ImportantRed Hat OpenShift Builds 1.8.1
- Red Hat OpenShift Builds 1.8.3 registry.redhat.io/openshift-builds/openshift-builds-controller-rhel9, registry.redhat.io/openshift-builds/openshift-builds-git-cloner-rhel9, registry.redhat.io/openshift-builds/openshift-builds-image-bundler-rhel9 +6
- RHSA-2026:37387 Released 2026-07-09 · Red Hat rating ImportantRed Hat OpenShift Data Foundation 4.22.0 security, enhancement & bug fix update
- Red Hat Openshift Data Foundation 4.22 registry.redhat.io/odf4/cephcsi-rhel9, registry.redhat.io/odf4/cephcsi-rhel9-operator, registry.redhat.io/odf4/devicefinder-rhel9 +24
- RHSA-2026:37276 Released 2026-07-09 · Red Hat rating ImportantRHTAS 1.4.2 - CLI Stack Release
- Red Hat Trusted Artifact Signer 1.4 conforma-cli-stack-v1-4-1.4.2@amd64, conforma-cli-stack-v1-4-1.4.2@amd64_darwin, conforma-cli-stack-v1-4-1.4.2@amd64_windows +4
- RHSA-2026:37271 Released 2026-07-09 · Red Hat rating ImportantRHTAS 1.4.2 - Red Hat Trusted Artifact Signer Release
- Red Hat Trusted Artifact Signer 1.4 registry.redhat.io/rhtas/cosign-rhel9, registry.redhat.io/rhtas/fetch-tsa-certs-rhel9, registry.redhat.io/rhtas/gitsign-rhel9 +2
- RHSA-2026:36797 Released 2026-07-08 · Red Hat rating ImportantRHTAS 1.4.2 - CLI Stack Release
- Red Hat Trusted Artifact Signer 1.4 conforma-cli-stack-v1-4-1.4.2@amd64, conforma-cli-stack-v1-4-1.4.2@amd64_darwin, conforma-cli-stack-v1-4-1.4.2@amd64_windows +4
- RHSA-2026:36648 Released 2026-07-08 · Red Hat rating ImportantRed Hat OpenShift Builds 1.7.4
- Red Hat OpenShift Builds 1.7.3 registry.redhat.io/openshift-builds/openshift-builds-controller-rhel9, registry.redhat.io/openshift-builds/openshift-builds-git-cloner-rhel9, registry.redhat.io/openshift-builds/openshift-builds-image-bundler-rhel9 +4
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
golang.org/x/crypto/ssh/agent 0.52.0
3 records Highest priority Priority MEDIUM 2 MEDIUM, 1 LOW
Other records, highest priority first
- TI-2026-28714 Invoking agent constraints dropped when forwarding keys in golang.org/x/crypto/ssh/agentPriority MEDIUM 48
- TI-2026-34257 Invoking pathological inputs can lead to client panic in golang.org/x/crypto/ssh/agentPriority LOW 30
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Assisted Installer for Red Hat OpenShift Container Platform 2 | Affected | No fix yet: Fix deferred |
| Confidential Compute Attestation | Affected | No fix yet: Fix deferred |
| Cryostat 4 | Affected | No fix yet: Fix deferred |
| Custom Metric Autoscaler operator for Red Hat Openshift | Affected | No fix yet: Fix deferred |
| Deployment Validation Operator | Affected | No fix yet: Fix deferred |
| Exploit Intelligence | Affected | No fix yet: Fix deferred |
| External Secrets Operator for Red Hat OpenShift | Affected | No fix yet: Fix deferred |
| ExternalDNS Operator | Affected | No fix yet: Fix deferred |
| File Integrity Operator | Affected | No fix yet: Fix deferred |
| Gatekeeper 3 | Affected | No fix yet: Fix deferred |
| Job Set 1 | Affected | No fix yet: Fix deferred |
| Job Set Tech Preview | Affected | No fix yet: Fix deferred |
| Kernel Module Management Operator for Red Hat Openshift | Affected | No fix yet: Fix deferred |
| Kube Descheduler Operator | Affected | No fix yet: Fix deferred |
| Leader Worker Set | Affected | No fix yet: Fix deferred |
| Logging Subsystem for Red Hat OpenShift | Affected | No fix yet: Fix deferred |
| Logical Volume Manager Storage | Affected | No fix yet: Fix deferred |
| MCP Server for Red Hat OpenShift | Affected | No fix yet: Fix deferred |
| Migration Toolkit for Applications 8 | Affected | No fix yet: Fix deferred |
| Migration Toolkit for Containers | Affected | No fix yet: Fix deferred |
| Migration Toolkit for Virtualization | Affected | No fix yet: Fix deferred |
| Multiarch Tuning Operator | Affected | No fix yet: Fix deferred |
| Multicluster Engine for Kubernetes | Affected | No fix yet: Fix deferred |
| Multicluster Global Hub | Affected | No fix yet: Fix deferred |
| Network Observability Operator | Affected | No fix yet: Fix deferred |
| Node HealthCheck Operator | Affected | No fix yet: Fix deferred |
| OpenShift API for Data Protection | Affected | No fix yet |
| OpenShift Developer Tools and Services | Affected | No fix yet: Fix deferred |
| OpenShift Lightspeed | Affected | No fix yet: Fix deferred |
| OpenShift Pipelines | Affected | No fix yet |
| OpenShift Run Once Duration Override Operator | Affected | No fix yet: Fix deferred |
| OpenShift Secondary Scheduler Operator | Affected | No fix yet: Fix deferred |
| OpenShift Serverless | Affected | No fix yet |
| OpenShift Service Mesh 2 | Affected | No fix yet: Fix deferred |
| OpenShift Service Mesh 3 | Affected | No fix yet: Fix deferred |
| Pen Drive Powered by Red Hat Lightspeed | Affected | No fix yet: Fix deferred |
| Power monitoring for Red Hat OpenShift | Affected | No fix yet: Fix deferred |
| Red Hat 3scale API Management Platform 2 | Affected | No fix yet: Fix deferred |
| Red Hat Advanced Cluster Management for Kubernetes 2 | Affected | No fix yet: Fix deferred |
| Red Hat Advanced Cluster Security 4 | Affected | No fix yet: Fix deferred |
| Red Hat Ansible Automation Platform 2 | Affected | No fix yet: Fix deferred |
| Red Hat Build of Kueue | Affected | No fix yet: Fix deferred |
| Red Hat Ceph Storage 5 | Affected | No fix yet: Fix deferred |
| Red Hat Ceph Storage 6 | Affected | No fix yet: Fix deferred |
| Red Hat Ceph Storage 7 | Affected | No fix yet: Fix deferred |
| Red Hat Ceph Storage 8 | Affected | No fix yet: Fix deferred |
| Red Hat Ceph Storage 9 | Affected | No fix yet: Fix deferred |
| Red Hat Connectivity Link 1 | Affected | No fix yet: Fix deferred |
| Red Hat Edge Manager 1 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 10 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 8 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift AI (RHOAI) | Affected | No fix yet |
| Red Hat OpenShift Cluster Manager CLI | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Container Platform 4 | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Container Platform 5 | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Dev Spaces | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Dev Workspaces Operator | Affected | No fix yet |
| Red Hat OpenShift GitOps | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Virtualization 4 | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift distributed tracing 3 | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift for Windows Containers | Affected | No fix yet: Fix deferred |
| Red Hat OpenStack Platform 16.2 | Affected | No fix yet: Fix deferred |
| Red Hat OpenStack Platform 17.1 | Affected | No fix yet: Fix deferred |
| Red Hat OpenStack Platform 18.0 | Affected | No fix yet: Fix deferred |
| Red Hat Openshift Data Foundation 4 | Affected | No fix yet: Fix deferred |
| Red Hat Quay 3 | Affected | No fix yet: Fix deferred |
| Red Hat Satellite 6 | Affected | No fix yet: Fix deferred |
| Red Hat Trusted Artifact Signer | Affected | No fix yet: Fix deferred |
| Red Hat Trusted Profile Analyzer | Affected | No fix yet: Fix deferred |
| Red Hat Web Terminal | Affected | No fix yet: Fix deferred |
| Security Profiles Operator | Affected | No fix yet: Fix deferred |
| Self Node Remediation Operator | Affected | No fix yet: Fix deferred |
| Self-service automation portal 2 | Affected | No fix yet: Fix deferred |
| Zero Trust Workload Identity Manager | Affected | No fix yet: Fix deferred |
| Zero Trust Workload Identity Manager - Tech Preview | Affected | No fix yet: Fix deferred |
| cert-manager Operator for Red Hat OpenShift | Affected | No fix yet: Fix deferred |
| Cert Manager support for Red Hat OpenShift release 1.17 | Fixed | RHSA-2026:82304, RHSA-2026:82322 |
| OpenShift API for Data Protection 1.4 | Fixed | RHSA-2026:94498 |
| OpenShift API for Data Protection 1.5 | Fixed | RHSA-2026:66022 |
| OpenShift API for Data Protection 1.6 | Fixed | RHSA-2026:43692 |
| Red Hat OpenShift Builds 1.7.3 | Fixed | RHSA-2026:36648 |
| Red Hat OpenShift Builds 1.8.3 | Fixed | RHSA-2026:41036 |
| Red Hat Openshift Data Foundation 4.22 | Fixed | RHSA-2026:37387 |
| Red Hat Trusted Artifact Signer 1.4 | Fixed | RHSA-2026:36797, RHSA-2026:37271, RHSA-2026:48771 |
| multicluster engine for Kubernetes 2.11 | Fixed | RHSA-2026:57194 |
Not affected: 25 products
- Compliance Operator
- Multicluster Engine for Kubernetes
- OpenShift API for Data Protection 1.4
- OpenShift API for Data Protection 1.5
- OpenShift API for Data Protection 1.6
- OpenShift Lightspeed
- Red Hat AI Inference Server
- Red Hat Advanced Cluster Security 4
- Red Hat Edge Manager 1
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat Hardened Images
- Red Hat OpenShift AI (RHOAI)
- Red Hat OpenShift Builds 1.7.3
- Red Hat OpenShift Builds 1.8.3
- Red Hat OpenShift Container Platform 4
- Red Hat OpenShift Container Platform 5
- Red Hat OpenShift distributed tracing 3
- Red Hat OpenStack Platform 16.2
- Red Hat Openshift Data Foundation 4.22
- Red Hat Trusted Artifact Signer
- Red Hat Trusted Artifact Signer 1.4
- multicluster engine for Kubernetes 2.11
Timeline
- 2026-10-02 Threatist record created from CVE-2026-39833
- 2026-10-03 Alias added: GHSA-jppx-rxg9-jmrx
- 2026-10-09 Affected versions changed · Red Hat
- 2026-10-14 Fix available: RHSA-2026:82304 · Red Hat
- 2026-10-14 Fix available: RHSA-2026:82322 · Red Hat
- 2026-10-15 Fix available: Cert Manager support for Red Hat OpenShift release 1.17 · Red Hat
- 2026-10-25 Fix available: Red Hat OpenShift Builds 1.8.3 · Red Hat
- 2026-10-30 Affected versions changed · Red Hat
- 2026-11-04 Fix available: RHSA-2026:94498 · Red Hat
- 2026-11-04 Fix available: OpenShift API for Data Protection 1.4 · Red Hat
- 2026-11-08 Affected versions changed · Red Hat
References
More Go standard library Crypto vulnerabilities
- TI-2023-26623 The SSH transport protocol with certain OpenSSH extensions, found in OpenSSH before 9.6… CVSS 3.1MEDIUM 5.9
- TI-2026-30791 Invoking auth bypass via unenforced @revoked status in golang.org/x/crypto/ssh/knownhosts CVSS 3.1CRITICAL 9.1
- TI-2026-34255 Invoking VerifiedPublicKeyCallback permissions skip enforcement in golang.org/x/crypto/ssh CVSS 3.1CRITICAL 10.0
- TI-2026-28714 Invoking agent constraints dropped when forwarding keys in golang.org/x/crypto/ssh/agent CVSS 3.1CRITICAL 9.1
- TI-2026-28713 Invoking bypass of FIDO/U2F security keys physical interaction in golang.org/x/crypto/ssh CVSS 3.1CRITICAL 9.1
- TI-2026-28716 Invoking infinite loop on large channel writes in golang.org/x/crypto/ssh CVSS 3.1CRITICAL 9.1
Sources
- CVE-2026-39833 · CVE Program
- CVE-2026-39833 · NVD
- FIRST EPSS
- GHSA-jppx-rxg9-jmrx · GitHub Advisory Database · CC BY 4.0
- CVE-2026-39833 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences