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-2026:68334
- https://access.redhat.com/errata/RHSA-2026:50319
- https://access.redhat.com/errata/RHSA-2026:59830
- https://access.redhat.com/errata/RHSA-2026:65838
- https://access.redhat.com/errata/RHSA-2026:56785
- https://access.redhat.com/errata/RHSA-2026:56910
- https://access.redhat.com/errata/RHSA-2026:56852
- https://access.redhat.com/errata/RHSA-2026:60018
- https://access.redhat.com/errata/RHSA-2026:57482
- https://access.redhat.com/errata/RHSA-2026:54552
- https://access.redhat.com/errata/RHSA-2026:50336
- https://access.redhat.com/errata/RHSA-2026:57845
- https://access.redhat.com/errata/RHSA-2026:57914
- https://access.redhat.com/errata/RHSA-2026:63636
- https://access.redhat.com/errata/RHSA-2026:49702
- https://access.redhat.com/errata/RHSA-2026:67517
- https://access.redhat.com/errata/RHSA-2026:65335
- https://access.redhat.com/errata/RHSA-2026:67974
- https://access.redhat.com/errata/RHSA-2026:66327
- https://access.redhat.com/errata/RHSA-2026:63332
- https://access.redhat.com/errata/RHSA-2026:22120
- https://access.redhat.com/errata/RHSA-2026:63022
- https://access.redhat.com/errata/RHSA-2026:65534
- https://access.redhat.com/errata/RHSA-2026:65116
- https://access.redhat.com/errata/RHSA-2026:65895
- https://access.redhat.com/errata/RHSA-2026:64818
- https://access.redhat.com/errata/RHSA-2026:63163
- https://access.redhat.com/errata/RHSA-2026:22112
- https://access.redhat.com/errata/RHSA-2026:62407
- https://access.redhat.com/errata/RHSA-2026:67148
- https://access.redhat.com/errata/RHSA-2026:68504
- https://access.redhat.com/errata/RHSA-2026:61253
- https://access.redhat.com/errata/RHSA-2026:62754
- https://access.redhat.com/errata/RHSA-2026:57649
- https://access.redhat.com/errata/RHSA-2026:68527
- https://access.redhat.com/errata/RHSA-2026:62753
- https://access.redhat.com/errata/RHSA-2026:49712
- https://access.redhat.com/errata/RHSA-2026:51112
- https://access.redhat.com/errata/RHSA-2026:65336
- https://access.redhat.com/errata/RHSA-2026:67975
- https://access.redhat.com/errata/RHSA-2026:62803
- https://access.redhat.com/errata/RHSA-2026:22121
- https://access.redhat.com/errata/RHSA-2026:62406
- https://access.redhat.com/errata/RHSA-2026:65886
- https://access.redhat.com/errata/RHSA-2026:65117
- https://access.redhat.com/errata/RHSA-2026:65153
- https://access.redhat.com/errata/RHSA-2026:54531
- https://access.redhat.com/errata/RHSA-2026:34364
- https://access.redhat.com/errata/RHSA-2026:56340
- https://access.redhat.com/errata/RHSA-2026:47952
- https://access.redhat.com/errata/RHSA-2026:50843
- https://access.redhat.com/errata/RHSA-2026:51033
- https://access.redhat.com/errata/RHSA-2026:59467
- https://access.redhat.com/errata/RHSA-2026:66022
- https://access.redhat.com/errata/RHSA-2026:43692
- https://access.redhat.com/errata/RHSA-2026:36319
- https://access.redhat.com/errata/RHSA-2026:36625
- https://access.redhat.com/errata/RHSA-2026:36754
- https://access.redhat.com/errata/RHSA-2026:33574
- https://access.redhat.com/errata/RHSA-2026:17713
- https://access.redhat.com/errata/RHSA-2026:17714
- https://access.redhat.com/errata/RHSA-2026:41928
- https://access.redhat.com/errata/RHSA-2026:50300
- https://access.redhat.com/errata/RHSA-2026:43038
- https://access.redhat.com/errata/RHSA-2026:42644
- https://access.redhat.com/errata/RHSA-2026:60520
- https://access.redhat.com/errata/RHSA-2026:59833
- https://access.redhat.com/errata/RHSA-2026:56789
- https://access.redhat.com/errata/RHSA-2026:56912
- https://access.redhat.com/errata/RHSA-2026:56854
- https://access.redhat.com/errata/RHSA-2026:60023
- https://access.redhat.com/errata/RHSA-2026:57487
- https://access.redhat.com/errata/RHSA-2026:54555
- https://access.redhat.com/errata/RHSA-2026:54583
- https://access.redhat.com/errata/RHSA-2026:54602
- https://access.redhat.com/errata/RHSA-2026:62260
- 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
- https://access.redhat.com/errata/RHSA-2026:54287
- https://access.redhat.com/errata/RHSA-2026:54284
- https://access.redhat.com/errata/RHSA-2026:54286
- https://access.redhat.com/errata/RHSA-2026:54285
- https://access.redhat.com/errata/RHSA-2026:54274
- https://access.redhat.com/errata/RHSA-2026:54283
- https://access.redhat.com/errata/RHSA-2026:41031
- https://access.redhat.com/errata/RHSA-2026:42146
- https://access.redhat.com/errata/RHSA-2026:43052
- https://access.redhat.com/errata/RHSA-2026:42796
- https://access.redhat.com/errata/RHSA-2026:41066
- https://access.redhat.com/errata/RHSA-2026:40262
- https://access.redhat.com/errata/RHSA-2026:36797
- https://access.redhat.com/errata/RHSA-2026:57194
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
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