Invoking bypass of certificate restrictions in golang.org/x/crypto/ssh
Priority LOW 28CWE-295Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Spoofing
- Confidentiality · integrity · availability
- Low · Low · Low
- Fix status
- Partial Red Hat: 44 fixed, 23 without a fix
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-295.
Summary
When an SSH server authentication callback returned PartialSuccessError with non-nil Permissions, those permissions were silently discarded, potentially dropping certificate restrictions such as force-command after a second factor succeeded. Returning non-nil Permissions with PartialSuccessError now results in a connection error.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00369 30th percentileScored 2026-11-07
Fix Partial golang.org/x/crypto/ssh (golang.org/x/crypto): 0.52.0golang.org/x/crypto (Go): 0.52.0Red Hat: 65 advisoriesRed Hat: 44 fixed, 23 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
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 | 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-45gg-vh54-h5m9 |
- golang.org/x/crypto/ssh 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-45gg-vh54-h5m9
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 (golang.org/x/crypto) Fixed in 0.52.0
- Fix · GHSA-45gg-vh54-h5m9 golang.org/x/crypto (Go) Fixed in 0.52.0 Advisory →
Red Hat 65 advisories
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- 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
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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 0.52.0
9 records Highest priority Priority MEDIUM 4 MEDIUM, 5 LOW
Other records, highest priority first
- TI-2026-34255 Invoking VerifiedPublicKeyCallback permissions skip enforcement in golang.org/x/crypto/sshPriority MEDIUM 50
- TI-2026-28713 Invoking bypass of FIDO/U2F security keys physical interaction in golang.org/x/crypto/sshPriority MEDIUM 48
- TI-2026-28716 Invoking infinite loop on large channel writes in golang.org/x/crypto/sshPriority MEDIUM 46
Vendor assessments
Red Hat
Red Hat rating: Important. 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 |
| Confidential Compute Attestation | Affected | No fix planned: Will not fix |
| External Secrets Operator for Red Hat OpenShift | Affected | No fix planned: Will not fix |
| Multicluster Engine for Kubernetes | Affected | No fix yet |
| OpenShift Pipelines | Affected | No fix yet |
| OpenShift Serverless | Affected | No fix yet |
| Red Hat Advanced Cluster Security 4 | Affected | No fix yet |
| Red Hat Ceph Storage 8 | Affected | No fix yet: Fix deferred |
| Red Hat Ceph Storage 9 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 10 | Affected | No fix yet |
| Red Hat Enterprise Linux 9 | Affected | No fix yet |
| Red Hat OpenShift Container Platform 4 | Affected | No fix yet |
| Red Hat OpenShift Container Platform 5 | Affected | No fix yet |
| Red Hat OpenShift Dev Spaces | Affected | No fix yet |
| Red Hat OpenShift GitOps | Affected | No fix planned: Will not fix |
| Red Hat OpenShift Virtualization 4 | Affected | No fix yet |
| Red Hat OpenShift for Windows Containers | Affected | No fix yet |
| Red Hat OpenShift on AWS | Affected | No fix yet |
| Red Hat OpenStack Platform 18.0 | Affected | No fix yet |
| Red Hat Quay 3 | Affected | No fix yet |
| Red Hat Trusted Artifact Signer | Affected | No fix yet |
| Zero Trust Workload Identity Manager | Affected | No fix planned: Will not fix |
| Zero Trust Workload Identity Manager - Tech Preview | Affected | No fix planned: Will not fix |
| Cert Manager support for Red Hat OpenShift release 1.17 | Fixed | RHSA-2026:82304, RHSA-2026:82322 |
| Cert Manager support for Red Hat OpenShift release 1.19 | Fixed | RHSA-2026:54531 |
| Cryostat 4 on RHEL 9 | Fixed | RHSA-2026:48151 |
| DevWorkspace Operator 0.42 | Fixed | RHSA-2026:36808 |
| Logging Subsystem for Red Hat OpenShift 6.6 | Fixed | RHSA-2026:66521 |
| OpenShift API for Data Protection 1.3 | Fixed | RHSA-2026:51033 |
| OpenShift API for Data Protection 1.4 | Fixed | RHSA-2026:59467 |
| OpenShift API for Data Protection 1.5 | Fixed | RHSA-2026:66022 |
| OpenShift API for Data Protection 1.6 | Fixed | RHSA-2026:43692 |
| OpenShift Security Profiles Operator 1 | Fixed | RHSA-2026:76752 |
| RHEM 1.0 for RHEL 9 | Fixed | RHSA-2026:36796 |
| RHEM 1.1 for RHEL 10 | Fixed | RHSA-2026:41019 |
| RHEM 1.1 for RHEL 9 | Fixed | RHSA-2026:41019 |
| Red Hat Advanced Cluster Management for Kubernetes 2.15 | Fixed | RHSA-2026:46903 |
| Red Hat Advanced Cluster Management for Kubernetes 2.16 | Fixed | RHSA-2026:57191 |
| Red Hat Advanced Cluster Security 4.9 | Fixed | RHSA-2026:26546, RHSA-2026:36319 |
| Red Hat Advanced Cluster Security for Kubernetes 4.11 | Fixed | RHSA-2026:36207 |
| Red Hat Advanced Cluster Security for Kubernetes for IBM Power, little endian 4.10 | Fixed | RHSA-2026:26547, RHSA-2026:36625 |
| Red Hat Edge Manager 1.0 | Fixed | RHSA-2026:36651 |
| Red Hat Edge Manager 1.1 | Fixed | RHSA-2026:40118, RHSA-2026:40945 |
| Red Hat OpenShift AI 3.3 | Fixed | RHSA-2026:73987 |
| Red Hat OpenShift AI 3.4 | Fixed | RHSA-2026:60520 |
| 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 Container Platform 4.14 | Fixed | RHSA-2026:82785 |
| Red Hat OpenShift Container Platform 4.20 | Fixed | RHSA-2026:68541 |
| Red Hat OpenShift Container Platform 4.21 | Fixed | RHSA-2026:66352 |
| Red Hat OpenShift Container Platform 4.22 | Fixed | RHSA-2026:51038, RHSA-2026:66358 |
| Red Hat OpenShift GitOps 1.19 | Fixed | RHSA-2026:52857 |
| Red Hat OpenShift GitOps 1.20 | Fixed | RHSA-2026:52910 |
| Red Hat Openshift Data Foundation 4.22 | Fixed | RHSA-2026:37387 |
| Red Hat Quay 3.10 | Fixed | RHSA-2026:41031 |
| Red Hat Quay 3.12 | Fixed | RHSA-2026:42146, RHSA-2026:43052 |
| Red Hat Quay 3.14 | Fixed | RHSA-2026:70267 |
| Red Hat Quay 3.15 | Fixed | RHSA-2026:42796 |
| Red Hat Quay 3.16 | Fixed | RHSA-2026:41066 |
| Red Hat Quay 3.17 | Fixed | RHSA-2026:54395 |
| Red Hat Quay 3.9 | Fixed | RHSA-2026:40262 |
| Red Hat Trusted Artifact Signer 1.3 | Fixed | RHSA-2026:40969, RHSA-2026:40972, RHSA-2026:40974 |
| Red Hat Trusted Artifact Signer 1.4 | Fixed | RHSA-2026:36797, RHSA-2026:37268, RHSA-2026:37271, RHSA-2026:37272, RHSA-2026:37278, RHSA-2026:37286, RHSA-2026:37296, RHSA-2026:48771 |
| multicluster engine for Kubernetes 2.10 | Fixed | RHSA-2026:46885 |
| multicluster engine for Kubernetes 2.11 | Fixed | RHSA-2026:57194 |
| multicluster engine for Kubernetes 2.6 | Fixed | RHSA-2026:36105, RHSA-2026:36167, RHSA-2026:41055 |
| multicluster engine for Kubernetes 2.8 | Fixed | RHSA-2026:47735 |
Not affected: 56 products
- Cryostat 4 on RHEL 9
- DevWorkspace Operator 0.42
- ExternalDNS Operator
- Logging Subsystem for Red Hat OpenShift 6.6
- OpenShift API for Data Protection 1.3
- OpenShift API for Data Protection 1.4
- OpenShift API for Data Protection 1.5
- OpenShift API for Data Protection 1.6
- OpenShift Security Profiles Operator 1
- RHEM 1.0 for RHEL 9
- RHEM 1.1 for RHEL 10
- RHEM 1.1 for RHEL 9
- Red Hat Advanced Cluster Management for Kubernetes 2
- Red Hat Advanced Cluster Management for Kubernetes 2.15
- Red Hat Advanced Cluster Management for Kubernetes 2.16
- Red Hat Advanced Cluster Security 4.9
- Red Hat Advanced Cluster Security for Kubernetes 4.11
- Red Hat Advanced Cluster Security for Kubernetes for IBM Power, little endian 4.10
- Red Hat Edge Manager 1.0
- Red Hat Edge Manager 1.1
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat OpenShift AI (RHOAI)
- Red Hat OpenShift AI 3.3
- Red Hat OpenShift AI 3.4
- 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 4.14
- Red Hat OpenShift Container Platform 4.20
- Red Hat OpenShift Container Platform 4.21
- Red Hat OpenShift Container Platform 4.22
- Red Hat OpenShift Container Platform 5
- Red Hat OpenShift GitOps
- Red Hat OpenShift GitOps 1.19
- Red Hat OpenShift GitOps 1.20
- Red Hat OpenShift Virtualization 4
- Red Hat OpenStack Platform 16.2
- Red Hat OpenStack Platform 17.1
- Red Hat OpenStack Platform 18.0
- Red Hat Openshift Data Foundation 4
- Red Hat Openshift Data Foundation 4.22
- Red Hat Quay 3.10
- Red Hat Quay 3.12
- Red Hat Quay 3.14
- Red Hat Quay 3.15
- Red Hat Quay 3.16
- Red Hat Quay 3.17
- Red Hat Quay 3.9
- Red Hat Trusted Artifact Signer 1.3
- Red Hat Trusted Artifact Signer 1.4
- multicluster engine for Kubernetes 2.10
- multicluster engine for Kubernetes 2.11
- multicluster engine for Kubernetes 2.6
- multicluster engine for Kubernetes 2.8
Timeline
- 2026-10-02 Threatist record created from CVE-2026-39828
- 2026-10-03 Alias added: GHSA-45gg-vh54-h5m9
- 2026-10-07 Fix available: RHSA-2026:73987 · Red Hat
- 2026-10-07 Fix available: RHSA-2026:76752 · Red Hat
- 2026-10-07 Fix available: OpenShift Security Profiles Operator 1 · 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
- 2026-10-22 Fix available: Red Hat Advanced Cluster Security for Kubernetes for IBM Z and LinuxONE 4.11 · Red Hat
- 2026-10-23 Fix available: RHSA-2026:82785 · Red Hat
- 2026-10-23 Fix available: Red Hat OpenShift Container Platform 4.14 · Red Hat
- 2026-10-25 Fix available: Red Hat OpenShift Builds 1.8.3 · Red Hat
- 2026-10-30 Affected versions changed · Red Hat
- 2026-10-31 Fix available: Red Hat Advanced Cluster Security for Kubernetes 4.11 · Red Hat
- 2026-11-05 Fix available: Red Hat Advanced Cluster Security for Kubernetes for IBM Power, little endian 4.10 · Red Hat
References
Other 38
- https://go.dev/issue/79562
- https://groups.google.com/g/golang-announce/c/a082jnz-LvI
- https://go.dev/cl/781621
- https://access.redhat.com/errata/RHSA-2026:40119
- https://access.redhat.com/errata/RHSA-2026:40262
- https://access.redhat.com/errata/RHSA-2026:40945
- https://access.redhat.com/errata/RHSA-2026:40969
- https://access.redhat.com/errata/RHSA-2026:40972
- https://access.redhat.com/errata/RHSA-2026:40974
- https://access.redhat.com/errata/RHSA-2026:41019
- https://access.redhat.com/errata/RHSA-2026:41031
- https://access.redhat.com/errata/RHSA-2026:41036
- https://access.redhat.com/errata/RHSA-2026:41055
- https://access.redhat.com/errata/RHSA-2026:41066
- https://access.redhat.com/security/cve/CVE-2026-39828
- https://bugzilla.redhat.com/show_bug.cgi?id=2480687
- https://cs.opensource.google/go/x/crypto
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-39828.json
- https://access.redhat.com/errata/RHSA-2026:26546
- https://access.redhat.com/errata/RHSA-2026:26547
- https://access.redhat.com/errata/RHSA-2026:36105
- https://access.redhat.com/errata/RHSA-2026:36167
- https://access.redhat.com/errata/RHSA-2026:36207
- https://access.redhat.com/errata/RHSA-2026:36319
- https://access.redhat.com/errata/RHSA-2026:36625
- https://access.redhat.com/errata/RHSA-2026:36648
- https://access.redhat.com/errata/RHSA-2026:36651
- https://access.redhat.com/errata/RHSA-2026:36796
- https://access.redhat.com/errata/RHSA-2026:36797
- https://access.redhat.com/errata/RHSA-2026:36808
- https://access.redhat.com/errata/RHSA-2026:37268
- https://access.redhat.com/errata/RHSA-2026:37271
- https://access.redhat.com/errata/RHSA-2026:37272
- https://access.redhat.com/errata/RHSA-2026:37278
- https://access.redhat.com/errata/RHSA-2026:37286
- https://access.redhat.com/errata/RHSA-2026:37296
- https://access.redhat.com/errata/RHSA-2026:37387
- https://access.redhat.com/errata/RHSA-2026:40118
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-2026-28715 Invoking key constraints not enforced in golang.org/x/crypto/ssh/agent CVSS 3.1CRITICAL 9.1
- 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
Sources
- CVE-2026-39828 · CVE Program
- CVE-2026-39828 · NVD
- FIRST EPSS
- GHSA-45gg-vh54-h5m9 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-39828 · 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