CVE-2026-33810

EUVD-2026-20024
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
UNKNOWN
---
Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Debian logo
Debian Releases
Debian Product
Codename
golang-1.15
bullseye
1.15.15-1~deb11u4
fixed
golang-1.19
bookworm
1.19.8-2
fixed
golang-1.24
forky
1.24.13-2
fixed
sid
1.24.13-2
fixed
trixie
1.24.4-1
fixed
golang-1.25
forky
1.25.8-1
fixed
sid
1.25.9-1
fixed
golang-1.26
forky
vulnerable
sid
1.26.2-1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
golang
jammy
dne
noble
dne
questing
dne
golang-1.6
jammy
dne
noble
dne
questing
dne
xenial
needs-triage
golang-1.8
bionic
needs-triage
jammy
dne
noble
dne
questing
dne
golang-1.9
bionic
needs-triage
jammy
dne
noble
dne
questing
dne
golang-1.10
bionic
needs-triage
jammy
dne
noble
dne
questing
dne
trusty
needs-triage
xenial
needs-triage
golang-1.13
bionic
needs-triage
focal
needs-triage
jammy
needs-triage
noble
dne
questing
dne
xenial
needs-triage
golang-1.14
focal
needs-triage
jammy
dne
noble
dne
questing
dne
golang-1.16
bionic
needs-triage
focal
needs-triage
jammy
dne
noble
dne
questing
dne
golang-1.17
jammy
needs-triage
noble
dne
questing
dne
golang-1.18
bionic
needs-triage
focal
needs-triage
jammy
needs-triage
noble
dne
questing
dne
xenial
needs-triage
golang-1.20
focal
needs-triage
jammy
needs-triage
noble
dne
questing
dne
golang-1.21
focal
needs-triage
jammy
needs-triage
noble
needs-triage
questing
dne
golang-1.22
focal
needs-triage
jammy
needs-triage
noble
needs-triage
questing
dne
golang-1.23
jammy
needs-triage
noble
needs-triage
questing
needs-triage
golang-1.24
jammy
needs-triage
noble
needs-triage
questing
needs-triage
golang-1.25
jammy
dne
noble
dne
questing
needs-triage