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CVE-2026-33810

Medium

Elevated severity or exploit probability.

CVSS base
8.2 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
EPSS — probability of exploitation (30 days)
0.3%
27.6th percentile
CISA KEV
Not listed
Weakness / dates
CWE-1289
Published 2026-04-08 · modified 2026-09-18

CVSS breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N

Attack VectorNNetwork
Attack ComplexityLLow
Privileges RequiredNNone
User InteractionNNone
ScopeUUnchanged
ConfidentialityHHigh
IntegrityLLow
AvailabilityNNone

Timeline

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.

Affected

golang

References

Official: NVD · CVE.org