8.8

CVE-2026-33810

Case-sensitive excludedSubtrees name constraints cause Auth Bypass in crypto/x509

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Golang ≫ Go Version >= 1.26.0 < 1.26.2
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.34% 0.258
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 8.2 3.9 4.2
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
134c704f-9b21-4f2e-91b3-4a467353bcc0 7.5 3.9 3.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
0b0ca135-0b70-47e7-9f44-1890c2a1c46c 8.8 2.8 5.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:L
CWE-1289 Improper Validation of Unsafe Equivalence in Input

The product receives an input value that is used as a resource identifier or other type of reference, but it does not validate or incorrectly validates that the input is equivalent to a potentially-unsafe value.

CWE-295 Improper Certificate Validation

The product does not validate, or incorrectly validates, a certificate.

https://go.dev/cl/763763
Patch
https://go.dev/issue/78332
Issue Tracking
http://www.openwall.com/lists/oss-security/2026/04/19/4
http://www.openwall.com/lists/oss-security/2026/04/20/1
https://bugzilla.redhat.com/show_bug.cgi?id=2456335
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33810.json
https://access.redhat.com/errata/RHSA-2026:25089
https://access.redhat.com/errata/RHSA-2026:28047
https://access.redhat.com/errata/RHSA-2026:7291
https://access.redhat.com/errata/RHSA-2026:10158
https://access.redhat.com/errata/RHSA-2026:13545
https://access.redhat.com/errata/RHSA-2026:19135
https://access.redhat.com/errata/RHSA-2026:19353
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-2026:22347
https://access.redhat.com/errata/RHSA-2026:22862
https://access.redhat.com/errata/RHSA-2026:23345
https://access.redhat.com/errata/RHSA-2026:26568
https://access.redhat.com/errata/RHSA-2026:26585
https://access.redhat.com/errata/RHSA-2026:29854
https://access.redhat.com/errata/RHSA-2026:34365
https://access.redhat.com/errata/RHSA-2026:9385
https://groups.google.com/g/golang-announce/c/0uYbvbPZRWU
Mailing List
Release Notes
https://access.redhat.com/errata/RHSA-2026:14391
https://access.redhat.com/errata/RHSA-2026:19144
https://access.redhat.com/errata/RHSA-2026:21772
https://access.redhat.com/errata/RHSA-2026:22485
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-2026:24478
https://access.redhat.com/errata/RHSA-2026:26571
https://access.redhat.com/errata/RHSA-2026:10155
https://access.redhat.com/errata/RHSA-2026:36651
https://access.redhat.com/errata/RHSA-2026:36796
https://pkg.go.dev/vuln/GO-2026-4866
Vendor Advisory
https://access.redhat.com/security/cve/CVE-2026-33810