Sending certain HTTP/2 frames can cause a server to panic in golang.org/x/net
Priority MEDIUM 40CWE-476Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 6 fixed, 66 without a fix
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-476.
Summary
Due to missing nil check, sending 0x0a-0x0f HTTP/2 frames will cause a running server to panic
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00569 47th percentileScored 2026-11-07
Fix Partial golang.org/x/net/http2 (golang.org/x/net): 0.51.0Red Hat: 8 advisoriesRed Hat: 6 fixed, 66 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- 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/net/http2 | 0.50.0 to before 0.51.0 | 0.51.0 | Patch available | CNA |
- golang.org/x/net/http2 VendorGo standard library Affected 0.50.0 to before 0.51.0 Fixed in 0.51.0 Patch available CNA
Remediation
- Fix · CNA golang.org/x/net/http2 (golang.org/x/net) Fixed in 0.51.0
Red Hat 8 advisories
- RHSA-2026:91249 Released 2026-10-27 · Red Hat rating CriticalRed Hat AI Base Images 3.5.5 (Neuron)
- Red Hat OpenShift AI 3.5 registry.redhat.io/rhai/base-image-neuron-rhel9
- RHSA-2026:91248 Released 2026-10-27 · Red Hat rating CriticalRed Hat AI Base Images 3.4.6 (Neuron)
- Red Hat OpenShift AI 3.4 registry.redhat.io/rhai/base-image-neuron-rhel9
- 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
Show 5 more Red Hat advisories
- 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-2026:26538 Released 2026-06-17 · Red Hat rating ImportantRed Hat OpenShift Pipelines Release 1.21.2
- Red Hat OpenShift Pipelines 1.21 registry.redhat.io/openshift-pipelines/pipelines-operator-bundle
- RHSA-2026:26519 Released 2026-06-17 · Red Hat rating ImportantRed Hat OpenShift Pipelines Release 1.21.2
- Red Hat OpenShift Pipelines 1.21 registry.redhat.io/openshift-pipelines/pipelines-resolvers-rhel9, registry.redhat.io/openshift-pipelines/pipelines-results-api-rhel9, registry.redhat.io/openshift-pipelines/pipelines-rhel9-operator
- RHSA-2026:7385 Released 2026-04-10 · Red Hat rating ImportantRed Hat Hardened Images RPMs bug fix and enhancement update
- Red Hat Hardened Images golang1.25-1.25.9-1.hum1@aarch64, golang1.25-1.25.9-1.hum1@src, golang1.25-1.25.9-1.hum1@x86_64 +12
- RHSA-2026:7291 Released 2026-04-09 · Red Hat rating ImportantRed Hat Hardened Images RPMs bug fix and enhancement update
- Red Hat Hardened Images golang1.26-1.26.2-1.hum1@aarch64, golang1.26-1.26.2-1.hum1@src, golang1.26-1.26.2-1.hum1@x86_64 +12
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 | — |
| Builds for Red Hat OpenShift | Affected | — |
| Compliance Operator | Affected | — |
| Confidential Compute Attestation | Affected | — |
| Cryostat 4 | Affected | — |
| Custom Metric Autoscaler operator for Red Hat Openshift | Affected | — |
| Deployment Validation Operator | Affected | — |
| External Secrets Operator for Red Hat OpenShift | Affected | — |
| ExternalDNS Operator | Affected | — |
| Fence Agents Remediation Operator | Affected | — |
| File Integrity Operator | Affected | — |
| Gatekeeper 3 | Affected | — |
| Logging Subsystem for Red Hat OpenShift | Affected | — |
| Logical Volume Manager Storage | Affected | — |
| Machine Deletion Remediation Operator | Affected | — |
| Migration Toolkit for Applications 8 | Affected | — |
| Migration Toolkit for Containers | Affected | — |
| Multicluster Engine for Kubernetes | Affected | — |
| Multicluster Global Hub | Affected | — |
| Network Observability Operator | Affected | — |
| Node HealthCheck Operator | Affected | — |
| OpenShift API for Data Protection | Affected | — |
| OpenShift Developer Tools and Services | Affected | — |
| OpenShift Lightspeed | Affected | — |
| OpenShift Pipelines | Affected | — |
| OpenShift Serverless | Affected | — |
| OpenShift Service Mesh 2 | Affected | — |
| OpenShift Service Mesh 3 | Affected | — |
| Power monitoring for Red Hat OpenShift | Affected | — |
| Red Hat 3scale API Management Platform 2 | Affected | — |
| Red Hat Advanced Cluster Management for Kubernetes 2 | Affected | — |
| Red Hat Advanced Cluster Security 4 | Affected | — |
| Red Hat Ansible Automation Platform 2 | Affected | — |
| Red Hat Certification Program for Red Hat Enterprise Linux 9 | Affected | — |
| Red Hat Connectivity Link 1 | Affected | — |
| Red Hat Developer Hub 1 | Affected | — |
| Red Hat Edge Manager 1 | Affected | — |
| Red Hat Enterprise Linux 10 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 8 | Affected | — |
| Red Hat Enterprise Linux 9 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux AI (RHEL AI) 3 | Affected | — |
| Red Hat Lightspeed for Runtimes Operator | Affected | — |
| Red Hat OpenShift AI (RHOAI) | Affected | — |
| Red Hat OpenShift Cluster Manager CLI | Affected | — |
| Red Hat OpenShift Container Platform 4 | Affected | — |
| Red Hat OpenShift Dev Spaces | Affected | — |
| Red Hat OpenShift Dev Workspaces Operator | Affected | — |
| Red Hat OpenShift GitOps | Affected | — |
| Red Hat OpenShift Virtualization 4 | Affected | — |
| Red Hat OpenShift distributed tracing 3 | Affected | — |
| Red Hat OpenShift for Windows Containers | Affected | — |
| Red Hat OpenShift on AWS | Affected | — |
| Red Hat OpenStack Platform 16.2 | Affected | — |
| Red Hat OpenStack Platform 17.1 | Affected | — |
| Red Hat OpenStack Platform 18.0 | Affected | — |
| Red Hat Quay 3 | Affected | — |
| Red Hat Satellite 6 | Affected | — |
| Red Hat Service Interconnect 1 | Affected | — |
| Red Hat Service Interconnect 2 | Affected | — |
| Red Hat Trusted Artifact Signer | Affected | — |
| Red Hat Web Terminal | Affected | — |
| Red Hat build of Apache Camel - HawtIO 4 | Affected | — |
| Security Profiles Operator | Affected | — |
| Zero Trust Workload Identity Manager | Affected | — |
| Zero Trust Workload Identity Manager - Tech Preview | Affected | — |
| cert-manager Operator for Red Hat OpenShift | Affected | — |
| Red Hat Hardened Images | Fixed | RHSA-2026:7291, RHSA-2026:7385 |
| Red Hat OpenShift AI 3.4 | Fixed | RHSA-2026:91248 |
| Red Hat OpenShift AI 3.5 | Fixed | RHSA-2026:91249 |
| Red Hat OpenShift Pipelines 1.21 | Fixed | RHSA-2026:26519, RHSA-2026:26538 |
| Red Hat Openshift Data Foundation 4.22 | Fixed | RHSA-2026:37387 |
| multicluster engine for Kubernetes 2.11 | Fixed | RHSA-2026:57194 |
Not affected: 3 products
- Red Hat OpenShift Pipelines 1.21
- Red Hat Openshift Data Foundation 4.22
- multicluster engine for Kubernetes 2.11
Timeline
- 2026-10-02 Threatist record created from CVE-2026-27141
- 2026-10-03 Alias added: GHSA-8fj7-8h3w-xwfm
- 2026-10-09 Affected versions changed · Red Hat
- 2026-10-14 EPSS moved to the 50th–90th percentile
- 2026-10-23 EPSS moved to the below the 50th percentile
- 2026-10-27 Affected versions changed · Red Hat
- 2026-10-30 Fix available: RHSA-2026:91248 · Red Hat
- 2026-10-30 Fix available: RHSA-2026:91249 · Red Hat
- 2026-10-30 Fix available: Red Hat OpenShift AI 3.4, Red Hat OpenShift AI 3.5 · Red Hat
References
More Go standard library vulnerabilities
- TI-2020-00578 Improper certificate validation in Microsoft Windows KEVCVSS 3.1HIGH 8.1
- TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
- TI-2023-24278 HTTP/2 CONTINUATION flood in net/http CVSS 3.1HIGH 7.5
- TI-2018-05208 The "go get" implementation in Go 1.9.4, when the -insecure command-line option is used… CVSS 3.1HIGH 8.8
- TI-2024-16309 Panic when parsing invalid palette-color images in golang.org/x/image CVSS 3.1HIGH 7.5
- TI-2022-20112 Request smuggling due to improper request handling in golang.org/x/net/http2/h2c CVSS 3.1HIGH 7.5
Sources
- CVE-2026-27141 · CVE Program
- CVE-2026-27141 · NVD
- FIRST EPSS
- GHSA-8fj7-8h3w-xwfm · GitHub Advisory Database · CC BY 4.0
- CVE-2026-27141 · 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