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High 7.5Published Apr 7, 2026

CVE-2026-32283Unauthenticated TLS 1.3 KeyUpdate record can cause persistent connection retention and DoS in crypto/tls

Updated under an hour ago ()

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It affects Go standard library crypto/tls and 59 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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If one side of the TLS connection sends multiple key update messages post-handshake in a single record, the connection can deadlock, causing uncontrolled consumption of resources. This can lead to a denial of service. This only affects TLS 1.3.

CVSS
7.5 HIGH (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE)
CWE-667, CWE-764
Known exploited
Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days)
Not loaded for this CVE
Assigned by
Go
NVD analysis
Modified
Record last updated
Sep 18, 2026
First seen by InfoSec Signals
Oct 9, 2026

Affected products

Affected products
Go standard library crypto/tls
go_standard_library:crypto_tls (from the name)
before 1.25.9; from 1.26.0-0 before 1.26.2
CNA record
from 4.1.1-7 not affected
CISA ADP
from 0:2.5.10-6.el8ap not affected
CISA ADP
from 0:1.25.9-3.el10_1 not affected
CISA ADP
from 0:1.25.9-1.el10_0 not affected
CISA ADP
from 0:1.4.0-7.el7_9 not affected
CISA ADP
from 8060020260515174849.ad008a3a not affected; from 8060020260803064027.ad008a3a not affected
CISA ADP
from 8060020260803064027.ad008a3a not affected
CISA ADP
from 8060020260515174849.ad008a3a not affected
CISA ADP
from 8060020260515174849.ad008a3a not affected
CISA ADP
from 0:0.144.0-2.el9_4 not affected
CISA ADP
from 1:1.4.0-7.rhaos4.15.el8 not affected
CISA ADP
from 0:0.2.1-1.1.el8ost not affected
CISA ADP
from 0:0.0.3-5.el8sat not affected
CISA ADP
Red Hat RHEM 1.0 for RHEL 9
redhat:edge_manager
from 0:1.0.3-1.el9em not affected
CISA ADP
from danielqsj-kafka_exporter not affected
CISA ADP
Red Hat Compliance Operator 1
redhat:openshift_compliance_operator
from 1781605005 not affected
CISA ADP
Red Hat Custom Metric Autoscaler 2.19
redhat:openshift_custom_metrics_autoscaler
from 1780101239 not affected
CISA ADP
Red Hat Multicluster Global Hub 1.3.4
redhat:multicluster_globalhub
from 1779210675 not affected
CISA ADP
Red Hat OpenShift API for Data Protection 1.5
redhat:openshift_api_data_protection
from 1788860461 not affected
CISA ADP
from 1.26.2-1.hum1 not affected
CISA ADP
from 1.0.3-1779996197 not affected
CISA ADP
from 1783914276 not affected
CISA ADP
from 1783544461 not affected
CISA ADP
Red Hat Red Hat OpenShift distributed tracing 3.11.1
redhat:openshift_distributed_tracing
from 1788356473 not affected
CISA ADP
from 1788561841 not affected
CISA ADP
from 1786655676 not affected
CISA ADP
2
CISA ADP
1
CISA ADP
1
CISA ADP
Red Hat Confidential Compute Attestation
redhat:confidential_compute_attestation
1
CISA ADP
Red Hat Deployment Validation Operator
redhat:deployment_validator_operator
All versions
CISA ADP
Red Hat ExternalDNS Operator
redhat:ext_dns_optr
1
CISA ADP
1
CISA ADP
Red Hat Fence Agents Remediation Operator
redhat:workload_availability_far
0
CISA ADP
Red Hat File Integrity Operator
redhat:openshift_file_integrity_operator
1
CISA ADP
Red Hat Gatekeeper 3
redhat:gatekeeper
3
CISA ADP
5
CISA ADP
4
CISA ADP
Red Hat Machine Deletion Remediation Operator
redhat:workload_availability_mdr
0
CISA ADP
Red Hat Migration Toolkit for Applications 8
redhat:migration_toolkit_applications
8
CISA ADP
1
CISA ADP
All versions
CISA ADP
Red Hat Network Observability Operator
redhat:network_observ_optr
1
CISA ADP
Red Hat Node HealthCheck Operator
redhat:workload_availability_nhc
0
CISA ADP
All versions
CISA ADP
Red Hat OpenShift Lightspeed
redhat:openshift_lightspeed
All versions
CISA ADP
Red Hat OpenShift Pipelines
redhat:openshift_pipelines
1
CISA ADP
1
CISA ADP
2
CISA ADP
Red Hat Power monitoring for Red Hat OpenShift
redhat:openshift_power_monitoring
All versions
CISA ADP
2
CISA ADP
2
CISA ADP
Red Hat Red Hat Advanced Cluster Security 4
redhat:advanced_cluster_security
4
CISA ADP
Red Hat Red Hat AI Inference Server
redhat:ai_inference_server
3
CISA ADP
7
CISA ADP
4
CISA ADP
2
CISA ADP
9
CISA ADP
Red Hat Red Hat Connectivity Link 1
redhat:connectivity_link
1
CISA ADP

References

  • patch
  • issue-tracking
  • mailing-list, release-notes
  • vendor-advisory

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.

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