CVE-2026-33810

When verifying a certificate chain containing excluded DNS constraints, these constraints are not correctly applied to wildcard DNS SANs which use a different case than the constraint. This only affects validation of otherwise trusted certificate chains, issued by a root CA in the VerifyOptions.Roots CertPool, or in the system certificate pool.
References
Link Resource
https://go.dev/cl/763763 Patch
https://go.dev/issue/78332 Issue Tracking
https://groups.google.com/g/golang-announce/c/0uYbvbPZRWU Mailing List Release Notes
https://pkg.go.dev/vuln/GO-2026-4866 Vendor Advisory
http://www.openwall.com/lists/oss-security/2026/04/19/4
http://www.openwall.com/lists/oss-security/2026/04/20/1
https://access.redhat.com/errata/RHSA-2026:10155
https://access.redhat.com/errata/RHSA-2026:10158
https://access.redhat.com/errata/RHSA-2026:13545
https://access.redhat.com/errata/RHSA-2026:14391
https://access.redhat.com/errata/RHSA-2026:19135
https://access.redhat.com/errata/RHSA-2026:19144
https://access.redhat.com/errata/RHSA-2026:19353
https://access.redhat.com/errata/RHSA-2026:19714
https://access.redhat.com/errata/RHSA-2026:19719
https://access.redhat.com/errata/RHSA-2026:19720
https://access.redhat.com/errata/RHSA-2026:19721
https://access.redhat.com/errata/RHSA-2026:21769
https://access.redhat.com/errata/RHSA-2026:21772
https://access.redhat.com/errata/RHSA-2026:22347
https://access.redhat.com/errata/RHSA-2026:22485
https://access.redhat.com/errata/RHSA-2026:22862
https://access.redhat.com/errata/RHSA-2026:22958
https://access.redhat.com/errata/RHSA-2026:22959
https://access.redhat.com/errata/RHSA-2026:22960
https://access.redhat.com/errata/RHSA-2026:22961
https://access.redhat.com/errata/RHSA-2026:22962
https://access.redhat.com/errata/RHSA-2026:23345
https://access.redhat.com/errata/RHSA-2026:24478
https://access.redhat.com/errata/RHSA-2026:25089
https://access.redhat.com/errata/RHSA-2026:26568
https://access.redhat.com/errata/RHSA-2026:26571
https://access.redhat.com/errata/RHSA-2026:26585
https://access.redhat.com/errata/RHSA-2026:28047
https://access.redhat.com/errata/RHSA-2026:29854
https://access.redhat.com/errata/RHSA-2026:34192
https://access.redhat.com/errata/RHSA-2026:34196
https://access.redhat.com/errata/RHSA-2026:34197
https://access.redhat.com/errata/RHSA-2026:34365
https://access.redhat.com/errata/RHSA-2026:36651
https://access.redhat.com/errata/RHSA-2026:36796
https://access.redhat.com/errata/RHSA-2026:39810
https://access.redhat.com/errata/RHSA-2026:40118
https://access.redhat.com/errata/RHSA-2026:40945
https://access.redhat.com/errata/RHSA-2026:41928
https://access.redhat.com/errata/RHSA-2026:42043
https://access.redhat.com/errata/RHSA-2026:42047
https://access.redhat.com/errata/RHSA-2026:42049
https://access.redhat.com/errata/RHSA-2026:42050
https://access.redhat.com/errata/RHSA-2026:42051
https://access.redhat.com/errata/RHSA-2026:47952
https://access.redhat.com/errata/RHSA-2026:49702
https://access.redhat.com/errata/RHSA-2026:49703
https://access.redhat.com/errata/RHSA-2026:49712
https://access.redhat.com/errata/RHSA-2026:51033
https://access.redhat.com/errata/RHSA-2026:51288
https://access.redhat.com/errata/RHSA-2026:54757
https://access.redhat.com/errata/RHSA-2026:56143
https://access.redhat.com/errata/RHSA-2026:56223
https://access.redhat.com/errata/RHSA-2026:57126
https://access.redhat.com/errata/RHSA-2026:57649
https://access.redhat.com/errata/RHSA-2026:59546
https://access.redhat.com/errata/RHSA-2026:61253
https://access.redhat.com/errata/RHSA-2026:61313
https://access.redhat.com/errata/RHSA-2026:61907
https://access.redhat.com/errata/RHSA-2026:62577
https://access.redhat.com/errata/RHSA-2026:62578
https://access.redhat.com/errata/RHSA-2026:63332
https://access.redhat.com/errata/RHSA-2026:65126
https://access.redhat.com/errata/RHSA-2026:65359
https://access.redhat.com/errata/RHSA-2026:65534
https://access.redhat.com/errata/RHSA-2026:65880
https://access.redhat.com/errata/RHSA-2026:65895
https://access.redhat.com/errata/RHSA-2026:66327
https://access.redhat.com/errata/RHSA-2026:67134
https://access.redhat.com/errata/RHSA-2026:67149
https://access.redhat.com/errata/RHSA-2026:67159
https://access.redhat.com/errata/RHSA-2026:67160
https://access.redhat.com/errata/RHSA-2026:67517
https://access.redhat.com/errata/RHSA-2026:67518
https://access.redhat.com/errata/RHSA-2026:7291
https://access.redhat.com/errata/RHSA-2026:9385
https://access.redhat.com/security/cve/CVE-2026-33810
https://bugzilla.redhat.com/show_bug.cgi?id=2456335
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33810.json
Configurations

Configuration 1 (hide)

cpe:2.3:a:golang:go:*:*:*:*:*:*:*:*

History

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Information

Published : 2026-04-08 02:16

Updated : 2026-09-16 13:17


NVD link : CVE-2026-33810

Mitre link : CVE-2026-33810

CVE.ORG link : CVE-2026-33810


JSON object : View

Products Affected

golang

  • go
CWE
CWE-295

Improper Certificate Validation

CWE-1289

Improper Validation of Unsafe Equivalence in Input