CVE-2026-42499
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
Pathological inputs could cause DoS through consumePhrase when parsing an email address according to RFC 5322.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Go standard library | net/mail | 0 < 1.25.10 | affected |
| Go standard library | net/mail | 1.26.0-0 < 1.26.3 | affected |
Weaknesses
- CWE-407: Inefficient Algorithmic Complexity
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: yes
- Technical Impact: partial
net/mail: golang: net/mail: Denial of Service via pathological email address parsing
Additional References
- https://access.redhat.com/security/cve/CVE-2026-42499
- https://bugzilla.redhat.com/show_bug.cgi?id=2467809
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42499.json
- https://access.redhat.com/errata/RHSA-2026:34364
- https://access.redhat.com/errata/RHSA-2026:33574
- https://access.redhat.com/errata/RHSA-2026:33120
- https://access.redhat.com/errata/RHSA-2026:33123
- https://access.redhat.com/errata/RHSA-2026:33142
- https://access.redhat.com/errata/RHSA-2026:33150
References
- https://go.dev/issue/78987
- https://go.dev/cl/771520
- https://groups.google.com/g/golang-announce/c/qcCIEXso47M
- https://pkg.go.dev/vuln/GO-2026-4977
Feedback
Was this page helpful?
Glad to hear it! Please tell us how we can improve.
Sorry to hear that. Please tell us how we can improve.