CVE-2026-42499
published 2026-05-07CVE-2026-42499: Pathological inputs could cause DoS through consumePhrase when parsing an email address according to RFC 5322.
PriorityP342high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
EPSS
0.80%
56.1th percentile
Pathological inputs could cause DoS through consumePhrase when parsing an email address according to RFC 5322.
Affected
102 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| advanced-cluster-security | rhacs-main-rhel8 | — | — |
| ansible-automation-platform | platform-operator-bundle | — | — |
| build-of-trustee | trustee-rhel9-operator | — | — |
| buildah_project | buildah | — | — |
| cert-manager | jetstack-cert-manager-rhel9 | — | — |
| compliance | openshift-compliance-operator-bundle | — | — |
| compliance | openshift-security-profiles-rhel8-operator | — | — |
| confidential-compute-attestation-tech-preview | trustee-rhel9-operator | — | — |
| container-native-virtualization | kubevirt-apiserver-proxy-rhel9 | — | — |
| container-native-virtualization | virt-api-rhel9 | — | — |
| container-tools_rhel8 | buildah | — | — |
| container-tools_rhel8 | conmon | — | — |
| container-tools_rhel8 | podman | — | — |
| container-tools_rhel8 | skopeo | — | — |
| cryostat | cryostat-storage-rhel9 | — | — |
| custom-metrics-autoscaler | custom-metrics-autoscaler-rhel9 | — | — |
| devspaces | configbump-rhel9 | — | — |
| devspaces | traefik-rhel9 | — | — |
| devworkspace | devworkspace-rhel9-operator | — | — |
| external-secrets-operator | external-secrets-rhel9 | — | — |
| gatekeeper | gatekeeper-rhel9-operator | — | — |
| go-toolset_rhel8 | golang | — | — |
| go_standard_library | net_mail | < 1.25.10 | 1.25.10 |
| go_standard_library | net_mail | >= 1.26.0-0 < 1.26.3 | 1.26.3 |
| golang | go | < 1.25.10 | 1.25.10 |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
vendor_redhat7.5HIGH
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GHSA
GHSA-xq5j-9r39-c3vf: Pathological inputs could cause DoS through consumePhrase when parsing an email address according to RFC 5322
ghsa_unreviewed·2026-05-07
CVE-2026-42499 [HIGH] GHSA-xq5j-9r39-c3vf: Pathological inputs could cause DoS through consumePhrase when parsing an email address according to RFC 5322
Pathological inputs could cause DoS through consumePhrase when parsing an email address according to RFC 5322.
VulDB
net-mail up to 1.25.9/1.26.2 on Go Email Address algorithmic complexity (EUVD-2026-28432)
vuldb·2026-05-07
CVE-2026-42499 [LOW] net-mail up to 1.25.9/1.26.2 on Go Email Address algorithmic complexity (EUVD-2026-28432)
A vulnerability classified as problematic has been found in net-mail up to 1.25.9/1.26.2 on Go. Affected by this vulnerability is an unknown functionality of the component Email Address Handler. The manipulation leads to inefficient algorithmic complexity.
This vulnerability is referenced as CVE-2026-42499. Remote exploitation of the attack is possible. No exploit is available.
It is recommended to upgrade the affected component.
Red Hat
net/mail: golang: net/mail: Denial of Service via pathological email address parsing
vendor_redhat·2026-05-07·CVSS 7.5
CVE-2026-42499 [HIGH] CWE-1046 net/mail: golang: net/mail: Denial of Service via pathological email address parsing
net/mail: golang: net/mail: Denial of Service via pathological email address parsing
Pathological inputs could cause DoS through consumePhrase when parsing an email address according to RFC 5322.
A flaw was found in the `net/mail` package within the Go standard library. A remote attacker could provide specially crafted, pathological email addresses. When these malformed email addresses are parsed by the `consumePhrase` function, it can lead to excessive resource consumption due to quadratic string concatenation, resulting in a Denial of Service (DoS) condition.
Statement: This is an Important denial of service vulnerability in the `net/mail` package of the Go standard library. A remote attacker can exploit this flaw by sending specially crafted email addresses, leading to excessive reso
No detection rules found.
No public exploits indexed.
Rapid7
Patch Tuesday - May 2026
blogs_rapid7·2026-05-13·CVSS 10.0
CVE-2026-41089 [CRITICAL] Patch Tuesday - May 2026
Microsoft is publishing 137 vulnerabilities on May 2026 Patch Tuesday . Microsoft is not aware of exploitation in the wild or public disclosure for any of these vulnerabilities. So far this month, Microsoft has provided patches to address 133 browser vulnerabilities, which are not included in the Patch Tuesday count above.
## Windows Netlogon: critical RCE
Anyone responsible for securing a domain controller should prioritize remediation of CVE-2026-41089 , which is a critical stack-based buffer overflow in Windows Netlogon with a CVSS v3 base score of 9.8. Exploitation leads to execution in the context of the Netlogon service, so that’s SYSTEM privileges on the domain controller. For most pentesters, that’s the point at which the customer report more or less writes itself. No privileges
Bugzilla
CVE-2026-42499 net/mail: golang: net/mail: Denial of Service via pathological email address parsing
bugzilla·2026-05-07·CVSS 7.5
CVE-2026-42499 [HIGH] CVE-2026-42499 net/mail: golang: net/mail: Denial of Service via pathological email address parsing
CVE-2026-42499 net/mail: golang: net/mail: Denial of Service via pathological email address parsing
Pathological inputs could cause DoS through consumePhrase when parsing an email address according to RFC 5322.
Discussion:
This issue has been addressed in the following products:
Red Hat Enterprise Linux 10
Via RHSA-2026:22120 https://access.redhat.com/errata/RHSA-2026:22120
---
This issue has been addressed in the following products:
Red Hat Enterprise Linux 9
Via RHSA-2026:22121 https://access.redhat.com/errata/RHSA-2026:22121
---
This issue has been addressed in the following products:
Red Hat Enterprise Linux 8
Via RHSA-2026:22112 https://access.redhat.com/errata/RHSA-2026:22112
https://go.dev/cl/771520https://go.dev/issue/78987https://groups.google.com/g/golang-announce/c/qcCIEXso47Mhttps://pkg.go.dev/vuln/GO-2026-4977https://access.redhat.com/errata/RHSA-2026:17713https://access.redhat.com/errata/RHSA-2026:17714https://access.redhat.com/errata/RHSA-2026:22112https://access.redhat.com/errata/RHSA-2026:22120https://access.redhat.com/errata/RHSA-2026:22121https://access.redhat.com/errata/RHSA-2026:33120https://access.redhat.com/errata/RHSA-2026:33123https://access.redhat.com/errata/RHSA-2026:33142https://access.redhat.com/errata/RHSA-2026:33150https://access.redhat.com/errata/RHSA-2026:33574https://access.redhat.com/errata/RHSA-2026:34364https://access.redhat.com/errata/RHSA-2026:36319https://access.redhat.com/errata/RHSA-2026:36625https://access.redhat.com/errata/RHSA-2026:36754https://access.redhat.com/errata/RHSA-2026:36797https://access.redhat.com/errata/RHSA-2026:40262https://access.redhat.com/errata/RHSA-2026:41031https://access.redhat.com/errata/RHSA-2026:41066https://access.redhat.com/errata/RHSA-2026:41928https://access.redhat.com/errata/RHSA-2026:42146https://access.redhat.com/errata/RHSA-2026:42644https://access.redhat.com/errata/RHSA-2026:42796https://access.redhat.com/errata/RHSA-2026:43038https://access.redhat.com/errata/RHSA-2026:43052https://access.redhat.com/errata/RHSA-2026:43692https://access.redhat.com/errata/RHSA-2026:47952https://access.redhat.com/errata/RHSA-2026:49702https://access.redhat.com/errata/RHSA-2026:49712https://access.redhat.com/errata/RHSA-2026:50300https://access.redhat.com/errata/RHSA-2026:50319https://access.redhat.com/errata/RHSA-2026:50336https://access.redhat.com/errata/RHSA-2026:50843https://access.redhat.com/errata/RHSA-2026:51033https://access.redhat.com/errata/RHSA-2026:51112https://access.redhat.com/errata/RHSA-2026:54274https://access.redhat.com/errata/RHSA-2026:54283https://access.redhat.com/errata/RHSA-2026:54284https://access.redhat.com/errata/RHSA-2026:54285https://access.redhat.com/errata/RHSA-2026:54286https://access.redhat.com/errata/RHSA-2026:54287https://access.redhat.com/errata/RHSA-2026:54531https://access.redhat.com/errata/RHSA-2026:54552https://access.redhat.com/errata/RHSA-2026:54555https://access.redhat.com/errata/RHSA-2026:54583https://access.redhat.com/errata/RHSA-2026:54602https://access.redhat.com/errata/RHSA-2026:56340https://access.redhat.com/errata/RHSA-2026:56785https://access.redhat.com/errata/RHSA-2026:56789https://access.redhat.com/errata/RHSA-2026:56852https://access.redhat.com/errata/RHSA-2026:56854https://access.redhat.com/errata/RHSA-2026:56910https://access.redhat.com/errata/RHSA-2026:56912https://access.redhat.com/errata/RHSA-2026:57194https://access.redhat.com/errata/RHSA-2026:57482https://access.redhat.com/errata/RHSA-2026:57487https://access.redhat.com/errata/RHSA-2026:57649https://access.redhat.com/errata/RHSA-2026:57845https://access.redhat.com/errata/RHSA-2026:57914https://access.redhat.com/errata/RHSA-2026:59467https://access.redhat.com/errata/RHSA-2026:59830https://access.redhat.com/errata/RHSA-2026:59833https://access.redhat.com/errata/RHSA-2026:60018https://access.redhat.com/errata/RHSA-2026:60023https://access.redhat.com/errata/RHSA-2026:60520https://access.redhat.com/errata/RHSA-2026:61253https://access.redhat.com/errata/RHSA-2026:62260https://access.redhat.com/errata/RHSA-2026:62406https://access.redhat.com/errata/RHSA-2026:62407https://access.redhat.com/errata/RHSA-2026:62753https://access.redhat.com/errata/RHSA-2026:62754https://access.redhat.com/errata/RHSA-2026:62803https://access.redhat.com/errata/RHSA-2026:63022https://access.redhat.com/errata/RHSA-2026:63163https://access.redhat.com/errata/RHSA-2026:63332https://access.redhat.com/errata/RHSA-2026:63636https://access.redhat.com/errata/RHSA-2026:64818https://access.redhat.com/errata/RHSA-2026:65116https://access.redhat.com/errata/RHSA-2026:65117https://access.redhat.com/errata/RHSA-2026:65153https://access.redhat.com/errata/RHSA-2026:65335https://access.redhat.com/errata/RHSA-2026:65336https://access.redhat.com/errata/RHSA-2026:65534https://access.redhat.com/errata/RHSA-2026:65838https://access.redhat.com/errata/RHSA-2026:65886https://access.redhat.com/errata/RHSA-2026:65895https://access.redhat.com/errata/RHSA-2026:66022https://access.redhat.com/errata/RHSA-2026:66327https://access.redhat.com/errata/RHSA-2026:67148https://access.redhat.com/errata/RHSA-2026:67517https://access.redhat.com/errata/RHSA-2026:67974https://access.redhat.com/errata/RHSA-2026:67975https://access.redhat.com/errata/RHSA-2026:68334https://access.redhat.com/errata/RHSA-2026:68504https://access.redhat.com/errata/RHSA-2026:68527https://access.redhat.com/security/cve/CVE-2026-42499https://bugzilla.redhat.com/show_bug.cgi?id=2467809
+ 1 more references
2026-05-07
Published