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High 7.5Published May 7, 2026

CVE-2026-42499Quadratic string concatenation in consumePhrase in net/mail

Updated under an hour ago ()

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It affects Go standard library net/mail 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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Pathological inputs could cause DoS through consumePhrase when parsing an email address according to RFC 5322.

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-407, CWE-1046
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 net/mail
go_standard_library:net_mail (from the name)
before 1.25.10; from 1.26.0-0 before 1.26.3
CNA record
from 0:2.5.10-7.el8ap not affected
CISA ADP
from 0:1.26.3-4.el10_2 not affected
CISA ADP
from 0:1.26.5-1.el10_0 not affected
CISA ADP
from 0:75-10.el8_8 not affected
CISA ADP
from 0:75-10.el8_8 not affected
CISA ADP
from 0:1.26.5-1.el9_6 not affected
CISA ADP
from 0:1.25.5-34.rhaos4.12.git6120b13.el8 not affected
CISA ADP
Red Hat RHEM 1.1 for RHEL 10
redhat:edge_manager
from 0:1.1.4-1.el10em not affected
CISA ADP
from 1786613805 not affected
CISA ADP
from 1785419067 not affected
CISA ADP
from 1786911952 not affected
CISA ADP
Red Hat OpenShift API for Data Protection 1.3
redhat:openshift_api_data_protection
from 1785177357 not affected
CISA ADP
Red Hat Red Hat Advanced Cluster Security 4.9
redhat:advanced_cluster_security
from 1783357116 not affected
CISA ADP
from 1783447707 not affected
CISA ADP
from 1.25.10-2.2.hum1 not affected
CISA ADP
from 1783953372 not affected
CISA ADP
Red Hat Red Hat Migration Toolkit for Applications 8.1
redhat:migration_toolkit_applications
from 1785171639 not affected
CISA ADP
from 1783544461 not affected
CISA ADP
from 1787756267 not affected
CISA ADP
from 1782222217 not affected
CISA ADP
from 1785202723 not affected
CISA ADP
from 1785203036 not affected
CISA ADP
from 1785203474 not affected
CISA ADP
from 1785203508 not affected
CISA ADP
from 1785203079 not affected
CISA ADP
from 1785202847 not affected
CISA ADP
from 1783750447 not affected
CISA ADP
Red Hat Red Hat Trusted Artifact Signer 1.4
redhat:trusted_artifact_signer
from 4-1.4.2 not affected; from 4-1.4.3 not affected
CISA ADP
2
CISA ADP
Red Hat Confidential Compute Attestation
redhat:confidential_compute_attestation
1
CISA ADP
Red Hat Cryostat 4
redhat:cryostat
4
CISA ADP
Red Hat Custom Metric Autoscaler operator for Red Hat Openshift
redhat:openshift_custom_metrics_autoscaler
2
CISA ADP
Red Hat ExternalDNS Operator
redhat:ext_dns_optr
1
CISA ADP
1
CISA ADP
Red Hat File Integrity Operator
redhat:openshift_file_integrity_operator
1
CISA ADP
Red Hat Gatekeeper 3
redhat:gatekeeper
3
CISA ADP
4
CISA ADP
Red Hat Multiarch Tuning Operator
redhat:multiarch_tuning_operator
Versions not stated
CISA ADP
Red Hat Multicluster Global Hub
redhat:multicluster_globalhub
Versions not stated
CISA ADP
Red Hat Network Observability Operator
redhat:network_observ_optr
1
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
Red Hat Power monitoring for Red Hat OpenShift
redhat:openshift_power_monitoring
All versions
CISA ADP
2
CISA ADP
5
CISA ADP
9
CISA ADP
3
CISA ADP
1
CISA ADP
Red Hat Red Hat OpenShift Cluster Manager CLI
redhat:openshift_cluster_manager_cli
1
CISA ADP
Red Hat Red Hat Openshift Data Foundation 4
redhat:openshift_data_foundation
4
CISA ADP
All versions
CISA ADP
Red Hat Red Hat OpenShift distributed tracing 3
redhat:openshift_distributed_tracing
3
CISA ADP
Versions not stated
CISA ADP
Red Hat Red Hat OpenShift GitOps
redhat:openshift_gitops
1
CISA ADP
Red Hat Red Hat OpenShift Virtualization 4
redhat:container_native_virtualization
4
CISA ADP
16.2
CISA ADP
6
CISA ADP

References

  • issue-tracking
  • patch
  • 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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