CVE-2026-39820 (GCVE-0-2026-39820)

Vulnerability from cvelistv5 – Published: 2026-05-07 19:41 – Updated: 2026-07-06 12:04
VLAI
Title
Quadratic string concatentation in consumeComment in net/mail
Summary
Well-crafted inputs reaching ParseAddress, ParseAddressList, and ParseDate were able to trigger excessive CPU exhaustion and memory allocations.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-407 - Inefficient Algorithmic Complexity
  • CWE-606 - Unchecked Input for Loop Condition
Assigner
Go
References
Impacted products
Vendor Product Version
Go standard library net/mail Affected: 0 , < 1.25.10 (semver)
Affected: 1.26.0-0 , < 1.26.3 (semver)
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Red Hat Logging Subsystem for Red Hat OpenShift 6.4     cpe:/a:redhat:logging:6.4::el9
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Red Hat Red Hat Developer Hub 1.9     cpe:/a:redhat:rhdh:1.9::el9
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Red Hat Red Hat OpenShift Service Mesh 3.0     cpe:/a:redhat:service_mesh:3.0::el9
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Red Hat Red Hat OpenShift Service Mesh 3.1     cpe:/a:redhat:service_mesh:3.1::el9
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Red Hat Red Hat OpenShift Service Mesh 3.2     cpe:/a:redhat:service_mesh:3.2::el9
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Red Hat Red Hat OpenShift Service Mesh 3.3     cpe:/a:redhat:service_mesh:3.3::el9
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Red Hat Assisted Installer for Red Hat OpenShift Container Platform 2     cpe:/a:redhat:assisted_installer:2
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Red Hat cert-manager Operator for Red Hat OpenShift     cpe:/a:redhat:cert_manager:1
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Red Hat Confidential Compute Attestation     cpe:/a:redhat:confidential_compute_attestation:1
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Red Hat Cryostat 4     cpe:/a:redhat:cryostat:4
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Red Hat Custom Metric Autoscaler operator for Red Hat Openshift     cpe:/a:redhat:openshift_custom_metrics_autoscaler:2
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Red Hat External Secrets Operator for Red Hat OpenShift     cpe:/a:redhat:external_secrets_operator:1
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Red Hat File Integrity Operator     cpe:/a:redhat:openshift_file_integrity_operator:1
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Red Hat Logical Volume Manager Storage     cpe:/a:redhat:lvms:4
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Red Hat Migration Toolkit for Applications 8     cpe:/a:redhat:migration_toolkit_applications:8
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Red Hat Migration Toolkit for Containers     cpe:/a:redhat:rhmt:1
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Red Hat Multiarch Tuning Operator     cpe:/a:redhat:multiarch_tuning_operator
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Red Hat Network Observability Operator     cpe:/a:redhat:network_observ_optr:1
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Red Hat OpenShift API for Data Protection     cpe:/a:redhat:openshift_api_data_protection:1
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Red Hat OpenShift Developer Tools and Services     cpe:/a:redhat:ocp_tools
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Red Hat OpenShift Lightspeed     cpe:/a:redhat:openshift_lightspeed
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Red Hat OpenShift Pipelines     cpe:/a:redhat:openshift_pipelines:1
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Red Hat OpenShift Serverless     cpe:/a:redhat:serverless:1
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Red Hat OpenShift Service Mesh 2     cpe:/a:redhat:service_mesh:2
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Red Hat OpenShift Service Mesh 3     cpe:/a:redhat:service_mesh:3
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Red Hat Power monitoring for Red Hat OpenShift     cpe:/a:redhat:openshift_power_monitoring
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Red Hat Red Hat Advanced Cluster Security 4     cpe:/a:redhat:advanced_cluster_security:4
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Red Hat Red Hat Ceph Storage 5     cpe:/a:redhat:ceph_storage:5
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Red Hat Red Hat Ceph Storage 6     cpe:/a:redhat:ceph_storage:6
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Red Hat Red Hat Ceph Storage 9     cpe:/a:redhat:ceph_storage:9
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Red Hat Red Hat Certification Program for Red Hat Enterprise Linux 9     cpe:/a:redhat:certifications:9
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Red Hat Red Hat Enterprise Linux 10     cpe:/o:redhat:enterprise_linux:10
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Red Hat Red Hat Enterprise Linux 8     cpe:/o:redhat:enterprise_linux:8
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Red Hat Red Hat Enterprise Linux 9     cpe:/o:redhat:enterprise_linux:9
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Red Hat Red Hat Enterprise Linux AI (RHEL AI) 3     cpe:/a:redhat:enterprise_linux_ai:3
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Red Hat Red Hat Hardened Images     cpe:/a:redhat:hummingbird:1
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Red Hat Red Hat OpenShift AI (RHOAI)     cpe:/a:redhat:openshift_ai
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Red Hat Red Hat OpenShift Cluster Manager CLI     cpe:/a:redhat:openshift_cluster_manager_cli:1
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Red Hat Red Hat OpenShift Container Platform 4     cpe:/a:redhat:openshift:4
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Red Hat Red Hat Openshift Data Foundation 4     cpe:/a:redhat:openshift_data_foundation:4
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Red Hat Red Hat OpenShift Dev Spaces     cpe:/a:redhat:openshift_devspaces:3
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Red Hat Red Hat OpenShift Dev Workspaces Operator     cpe:/a:redhat:devworkspace
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Red Hat Red Hat OpenShift distributed tracing 3     cpe:/a:redhat:openshift_distributed_tracing:3
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Red Hat Red Hat OpenShift for Windows Containers     cpe:/a:redhat:windows_machine_config
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Red Hat Red Hat OpenShift GitOps     cpe:/a:redhat:openshift_gitops:1
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Red Hat Red Hat OpenShift Virtualization 4     cpe:/a:redhat:container_native_virtualization:4
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Red Hat Red Hat OpenStack Platform 18.0     cpe:/a:redhat:openstack:18.0
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Red Hat Red Hat Quay 3     cpe:/a:redhat:quay:3
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Red Hat Red Hat Service Interconnect 1     cpe:/a:redhat:service_interconnect:1
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Red Hat Red Hat Service Interconnect 2     cpe:/a:redhat:service_interconnect:2
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Red Hat Red Hat Trusted Artifact Signer     cpe:/a:redhat:trusted_artifact_signer:1
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Red Hat Security Profiles Operator     cpe:/a:redhat:openshift_security_profiles_operator:1
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Red Hat Zero Trust Workload Identity Manager     cpe:/a:redhat:zero_trust_workload_identity_manager:1
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Red Hat Zero Trust Workload Identity Manager - Tech Preview     cpe:/a:redhat:zero_trust_workload_identity_manager:0
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Red Hat Red Hat OpenStack Platform 16.2     cpe:/a:redhat:openstack:16.2
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Red Hat Red Hat OpenStack Platform 17.1     cpe:/a:redhat:openstack:17.1
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Red Hat Gatekeeper 3     cpe:/a:redhat:gatekeeper:3
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Red Hat Multicluster Engine for Kubernetes     cpe:/a:redhat:multicluster_engine
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Red Hat Multicluster Global Hub     cpe:/a:redhat:multicluster_globalhub
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Red Hat Red Hat Advanced Cluster Management for Kubernetes 2     cpe:/a:redhat:acm:2
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Red Hat Red Hat Ansible Automation Platform 2     cpe:/a:redhat:ansible_automation_platform:2
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Red Hat Red Hat Edge Manager 1     cpe:/a:redhat:edge_manager:1
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Red Hat Red Hat Lightspeed for Runtimes Operator     cpe:/a:redhat:lightspeed_for_runtimes:1
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Red Hat Red Hat Satellite 6     cpe:/a:redhat:satellite:6
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Credits
thatnealpatel
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              "cpe:/a:redhat:ceph_storage:6"
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              "cpe:/o:redhat:enterprise_linux:8"
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          {
            "cpes": [
              "cpe:/o:redhat:enterprise_linux:9"
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          {
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              "cpe:/a:redhat:enterprise_linux_ai:3"
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              "cpe:/a:redhat:hummingbird:1"
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          {
            "cpes": [
              "cpe:/a:redhat:openshift_ai"
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            "defaultStatus": "affected",
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          {
            "cpes": [
              "cpe:/a:redhat:openshift_cluster_manager_cli:1"
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            "product": "Red Hat OpenShift Cluster Manager CLI",
            "vendor": "Red Hat"
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          {
            "cpes": [
              "cpe:/a:redhat:openshift:4"
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          },
          {
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            "vendor": "Red Hat"
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          {
            "cpes": [
              "cpe:/a:redhat:openshift_devspaces:3"
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            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:devworkspace"
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            "defaultStatus": "affected",
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            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:openshift_distributed_tracing:3"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat OpenShift distributed tracing 3",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:windows_machine_config"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat OpenShift for Windows Containers",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:openshift_gitops:1"
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            "defaultStatus": "affected",
            "product": "Red Hat OpenShift GitOps",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:container_native_virtualization:4"
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            "vendor": "Red Hat"
          },
          {
            "cpes": [
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            "defaultStatus": "affected",
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            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:quay:3"
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            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:service_interconnect:1"
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            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:service_interconnect:2"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Service Interconnect 2",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:trusted_artifact_signer:1"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Trusted Artifact Signer",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:openshift_security_profiles_operator:1"
            ],
            "defaultStatus": "affected",
            "product": "Security Profiles Operator",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:zero_trust_workload_identity_manager:1"
            ],
            "defaultStatus": "affected",
            "product": "Zero Trust Workload Identity Manager",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:zero_trust_workload_identity_manager:0"
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            "defaultStatus": "affected",
            "product": "Zero Trust Workload Identity Manager - Tech Preview",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:openstack:16.2"
            ],
            "defaultStatus": "unaffected",
            "product": "Red Hat OpenStack Platform 16.2",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:openstack:17.1"
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            "product": "Red Hat OpenStack Platform 17.1",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:gatekeeper:3"
            ],
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            "product": "Gatekeeper 3",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:multicluster_engine"
            ],
            "defaultStatus": "unknown",
            "product": "Multicluster Engine for Kubernetes",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:multicluster_globalhub"
            ],
            "defaultStatus": "unknown",
            "product": "Multicluster Global Hub",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:acm:2"
            ],
            "defaultStatus": "unknown",
            "product": "Red Hat Advanced Cluster Management for Kubernetes 2",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:ansible_automation_platform:2"
            ],
            "defaultStatus": "unknown",
            "product": "Red Hat Ansible Automation Platform 2",
            "vendor": "Red Hat"
          },
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            "cpes": [
              "cpe:/a:redhat:edge_manager:1"
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            "defaultStatus": "unknown",
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            "defaultStatus": "unknown",
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            "vendor": "Red Hat"
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        "datePublic": "2026-05-07T19:41:19.854Z",
        "descriptions": [
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      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.