CVE-2026-33810

Published Apr 8, 2026

Last updated 3 days ago

CVSS high 8.2

Overview

Description
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.
Source
security@golang.org
NVD status
Modified
Products
go

Risk scores

CVSS 3.1

Type
Primary
Base score
8.2
Impact score
4.2
Exploitability score
3.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
Severity
HIGH

Weaknesses

nvd@nist.gov
CWE-295

Social media

Hype score
Not currently trending

Configurations

Related CVEs

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  4. On Linux, if the target of Root.Chmod is replaced with a symlink while the chmod operation is in progress, Chmod can operate on the target of the symlink, even when the target lies outside the root. The Linux fchmodat syscall silently ignores the AT_SYMLINK_NOFOLLOW flag, which Root.Chmod uses to avoid symlink traversal. Root.Chmod checks its target before acting and returns an error if the target is a symlink lying outside the root, so the impact is limited to cases where the target is replaced with a symlink between the check and operation.•CVE-2026-32282
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References

Sources include official advisories and independent security research.