CVE-2026-27137
High
Description
When verifying a certificate chain which contains a certificate containing multiple email address constraints which share common local portions but different domain portions, these constraints will not be properly applied, and only the last constraint will be considered.
SeverityHigh
CVSS7.5
Exploit probability—
ProductGo
PublishedMar 6, 2026
First seenMar 6, 2026
Weakness typeCWE-295CWE-295
How to fix
Update
- stdlib1.26.1 or later
Vendor advisories
- access.redhat.com/errata/RHSA-2026:41019
- access.redhat.com/errata/RHSA-2026:54757
- access.redhat.com/errata/RHSA-2026:36796
- access.redhat.com/errata/RHSA-2026:28047
- access.redhat.com/errata/RHSA-2026:39810
- access.redhat.com/errata/RHSA-2026:49703
- access.redhat.com/errata/RHSA-2026:49702
- access.redhat.com/errata/RHSA-2026:67517
- access.redhat.com/errata/RHSA-2026:56143
- access.redhat.com/errata/RHSA-2026:10929
- access.redhat.com/errata/RHSA-2026:8842
- access.redhat.com/errata/RHSA-2026:10169
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| golang go | 1.26.0 | — |
| stdlibGo | 1.26.0-0 ≤ v < 1.26.1 | 1.26.1 |
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