Go net/mail 1.25.x-1.26.3: ParseAddress/Date CPU/Memory Exhaustion
CVE-2026-39820 Published on May 7, 2026

Quadratic string concatentation in consumeComment in net/mail
Well-crafted inputs reaching ParseAddress, ParseAddressList, and ParseDate were able to trigger excessive CPU exhaustion and memory allocations.

NVD

Vulnerability Analysis

CVE-2026-39820 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.

Attack Vector:
NETWORK
Attack Complexity:
LOW
Privileges Required:
NONE
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
NONE
Integrity Impact:
NONE
Availability Impact:
HIGH

Weakness Type

Unchecked Input for Loop Condition

The product does not properly check inputs that are used for loop conditions, potentially leading to a denial of service or other consequences because of excessive looping.


Products Associated with CVE-2026-39820

You can be notified by email with stack.watch whenever vulnerabilities like CVE-2026-39820 are published in these products:

GoLang Go
 
Red Hat Service Mesh
 
Red Hat Assisted Installer
 
Red Hat Cert Manager
 
Red Hat Confidential Compute Attestation
 
Red Hat Cryostat
 
Red Hat Openshift Custom Metrics Autoscaler
 
Red Hat External Secrets Operator
 
Red Hat Openshift File Integrity Operator
 
Red Hat Logging
 
Red Hat Lvms
 
Red Hat Migration Toolkit Applications
 
Red Hat Rhmt
 
Red Hat Multiarch Tuning Operator
 
Red Hat Network Observ Optr
 
Red Hat Openshift Api Data Protection
 
Red Hat Ocp Tools
 
Red Hat Openshift Lightspeed
 
Red Hat Openshift Pipelines
 
Red Hat Serverless
 
Red Hat Openshift Power Monitoring
 
Red Hat Advanced Cluster Security
 
Red Hat Ceph Storage
 
Red Hat Certifications
 
Red Hat Rhdh
 
Red Hat Enterprise Linux (RHEL)
 
Red Hat Enterprise Linux Ai
 
Red Hat Hummingbird
 
Red Hat Openshift Ai
 
Red Hat Openshift Cluster Manager Cli
 
Red Hat Openshift
 
Red Hat Openshift Data Foundation
 
Red Hat Openshift Devspaces
 
Red Hat Devworkspace
 
Red Hat Openshift Distributed Tracing
 
Red Hat Windows Machine Config
 
Red Hat Openshift Gitops
 
Red Hat Container Native Virtualization
 
Red Hat Openstack
 
Red Hat Quay
 
Red Hat Service Interconnect
 
Red Hat Trusted Artifact Signer
 
Red Hat Openshift Security Profiles Operator
 
Red Hat Zero Trust Workload Identity Manager
 
Red Hat Gatekeeper
 
Red Hat Multicluster Engine
 
Red Hat Multicluster Globalhub
 
Red Hat Acm
 
Red Hat Ansible Automation Platform
 
Red Hat Edge Manager
 
Red Hat Lightspeed For Runtimes
 
Red Hat Satellite
 

Affected Versions

Go standard library net/mail: Logging for Red Hat OpenShift 6.4: Red Hat OpenShift API for Data Protection 1.6: Red Hat Advanced Cluster Security 4.9: Red Hat Advanced Cluster Security for Kubernetes 4.10: Red Hat Developer Hub 1.10: Red Hat Developer Hub 1.9: Red Hat Hardened Images: Red Hat Hardened Images: Red Hat Migration Toolkit 1.8: Red Hat Migration Toolkit for Applications 8.2: Red Hat OpenShift AI 2.25: Red Hat OpenShift Service Mesh 3.0: Red Hat OpenShift Service Mesh 3.0: Red Hat OpenShift Service Mesh 3.0: Red Hat OpenShift Service Mesh 3.0: Red Hat OpenShift Service Mesh 3.1: Red Hat OpenShift Service Mesh 3.1: Red Hat OpenShift Service Mesh 3.1: Red Hat OpenShift Service Mesh 3.1: Red Hat OpenShift Service Mesh 3.2: Red Hat OpenShift Service Mesh 3.2: Red Hat OpenShift Service Mesh 3.2: Red Hat OpenShift Service Mesh 3.2: Red Hat OpenShift Service Mesh 3.3: Red Hat OpenShift Service Mesh 3.3: Red Hat OpenShift Service Mesh 3.3: Red Hat OpenShift Service Mesh 3.3: Red Hat Quay 3.1: Red Hat Quay 3.12: Red Hat Quay 3.15: Red Hat Quay 3.16: Red Hat Quay 3.9: Red Hat Trusted Artifact Signer 1.4: Assisted Installer for Red Hat OpenShift Container Platform 2: cert-manager Operator for Red Hat OpenShift: Red Hat Confidential Compute Attestation: Red Hat Confidential Compute Attestation: Red Hat Confidential Compute Attestation: Red Hat Cryostat 4: Custom Metric Autoscaler operator for Red Hat Openshift: External Secrets Operator for Red Hat OpenShift: Red Hat File Integrity Operator: Red Hat Gatekeeper 3: Red Hat Logical Volume Manager Storage: Red Hat Logical Volume Manager Storage: Red Hat Logical Volume Manager Storage: Red Hat Multiarch Tuning Operator: Red Hat Multicluster Engine for Kubernetes: Red Hat Multicluster Engine for Kubernetes: Red Hat Multicluster Engine for Kubernetes: Red Hat Multicluster Engine for Kubernetes: Red Hat Multicluster Engine for Kubernetes: Red Hat Multicluster Engine for Kubernetes: Red Hat Multicluster Engine for Kubernetes: Red Hat Multicluster Engine for Kubernetes: Red Hat Multicluster Engine for Kubernetes: Red Hat Multicluster Engine for Kubernetes: Red Hat Multicluster Engine for Kubernetes: Red Hat Multicluster Engine for Kubernetes: Red Hat Multicluster Engine for Kubernetes: Red Hat Multicluster Global Hub: Red Hat Multicluster Global Hub: Red Hat Network Observability Operator: Red Hat OpenShift API for Data Protection: Red Hat OpenShift Developer Tools and Services: Red Hat OpenShift Lightspeed: Red Hat OpenShift Pipelines: Red Hat OpenShift Serverless: Red Hat OpenShift Service Mesh 2: Red Hat OpenShift Service Mesh 2: Red Hat OpenShift Service Mesh 3: Power monitoring for Red Hat OpenShift: Red Hat Advanced Cluster Management for Kubernetes 2: Red Hat Advanced Cluster Management for Kubernetes 2: Red Hat Advanced Cluster Management for Kubernetes 2: Red Hat Advanced Cluster Management for Kubernetes 2: Red Hat Advanced Cluster Management for Kubernetes 2: Red Hat Advanced Cluster Management for Kubernetes 2: Red Hat Ansible Automation Platform 2: Red Hat Ansible Automation Platform 2: Red Hat Ansible Automation Platform 2: Red Hat Ansible Automation Platform 2: Red Hat Ceph Storage 5: Red Hat Ceph Storage 6: Red Hat Ceph Storage 9: Red Hat Certification Program for Red Hat Enterprise Linux 9: Red Hat Edge Manager 1: Red Hat Edge Manager 1: Red Hat Enterprise Linux 10: Red Hat Enterprise Linux 10: Red Hat Enterprise Linux 10: Red Hat Enterprise Linux 10: Red Hat Enterprise Linux 10: Red Hat Enterprise Linux 10: Red Hat Enterprise Linux 10: Red Hat Enterprise Linux 10: Red Hat Enterprise Linux 10: Red Hat Enterprise Linux 10: Red Hat Enterprise Linux 10: Red Hat Enterprise Linux 10: Red Hat Enterprise Linux 8: Red Hat Enterprise Linux 8: Red Hat Enterprise Linux 8: Red Hat Enterprise Linux 8: Red Hat Enterprise Linux 8: Red Hat Enterprise Linux 8: Red Hat Enterprise Linux 8: Red Hat Enterprise Linux 9: Red Hat Enterprise Linux 9: Red Hat Enterprise Linux 9: Red Hat Enterprise Linux 9: Red Hat Enterprise Linux 9: Red Hat Enterprise Linux 9: Red Hat Enterprise Linux 9: Red Hat Enterprise Linux 9: Red Hat Enterprise Linux 9: Red Hat Enterprise Linux 9: Red Hat Enterprise Linux 9: Red Hat Enterprise Linux 9: Red Hat Enterprise Linux 9: Red Hat Enterprise Linux AI (RHEL AI) 3: Red Hat Lightspeed for Runtimes Operator: Red Hat OpenShift AI (RHOAI): Red Hat OpenShift AI (RHOAI): Red Hat OpenShift AI (RHOAI): Red Hat OpenShift AI (RHOAI): Red Hat OpenShift AI (RHOAI): Red Hat OpenShift AI (RHOAI): Red Hat OpenShift AI (RHOAI): Red Hat OpenShift AI (RHOAI): Red Hat OpenShift AI (RHOAI): Red Hat OpenShift AI (RHOAI): Red Hat OpenShift AI (RHOAI): Red Hat OpenShift AI (RHOAI): Red Hat OpenShift AI (RHOAI): Red Hat OpenShift AI (RHOAI): Red Hat OpenShift AI (RHOAI): Red Hat OpenShift AI (RHOAI): Red Hat OpenShift AI (RHOAI): Red Hat OpenShift AI (RHOAI): Red Hat OpenShift AI (RHOAI): Red Hat OpenShift AI (RHOAI): Red Hat OpenShift AI (RHOAI): Red Hat OpenShift AI (RHOAI): Red Hat OpenShift Cluster Manager CLI: Red Hat OpenShift Container Platform 4: Red Hat OpenShift Container Platform 4: Red Hat OpenShift Container Platform 4: Red Hat OpenShift Container Platform 4: Red Hat OpenShift Container Platform 4: Red Hat OpenShift Container Platform 4: Red Hat OpenShift Container Platform 4: Red Hat OpenShift Container Platform 4: Red Hat OpenShift Container Platform 4: Red Hat OpenShift Container Platform 4: Red Hat OpenShift Container Platform 4: Red Hat OpenShift Container Platform 4: Red Hat OpenShift Container Platform 4: Red Hat OpenShift Container Platform 4: Red Hat OpenShift Container Platform 4: Red Hat OpenShift Container Platform 4: Red Hat OpenShift Container Platform 4: Red Hat OpenShift Container Platform 4: Red Hat OpenShift Container Platform 4: Red Hat OpenShift Container Platform 4: Red Hat Openshift Data Foundation 4: Red Hat Openshift Data Foundation 4: Red Hat Openshift Data Foundation 4: Red Hat Openshift Data Foundation 4: Red Hat Openshift Data Foundation 4: Red Hat OpenShift Dev Spaces: Red Hat OpenShift Dev Spaces: Red Hat OpenShift Dev Workspaces Operator: Red Hat OpenShift distributed tracing 3: Red Hat OpenShift for Windows Containers: Red Hat OpenShift GitOps: Red Hat OpenShift GitOps: Red Hat OpenShift Virtualization 4: Red Hat OpenShift Virtualization 4: Red Hat OpenShift Virtualization 4: 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 Quay 3: Red Hat Satellite 6: Red Hat Service Interconnect 1: Red Hat Service Interconnect 2: Red Hat Trusted Artifact Signer: Red Hat Security Profiles Operator: Red Hat Zero Trust Workload Identity Manager: Red Hat Zero Trust Workload Identity Manager - Tech Preview:

Exploit Probability

EPSS
0.78%
Percentile
52.29%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.