From dd433df514bae239679aae58db4c4e3c426daf7f Mon Sep 17 00:00:00 2001
From: jvermaat <80486526+jvermaat@users.noreply.github.com>
Date: Tue, 25 Nov 2025 12:05:56 +0100
Subject: [PATCH] Add CN to subject

This will add the first domain as the Common Name (CN) in the subject.
---
 acme/src/acme/crypto_util.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/acme/src/acme/crypto_util.py b/acme/src/acme/crypto_util.py
index 765cd7c10..5f445d592 100644
--- a/acme/src/acme/crypto_util.py
+++ b/acme/src/acme/crypto_util.py
@@ -88,7 +88,11 @@ def make_csr(
 
     builder = (
         x509.CertificateSigningRequestBuilder()
-        .subject_name(x509.Name([]))
+        .subject_name(
+            x509.Name([
+                x509.NameAttribute(x509.oid.NameOID.COMMON_NAME, domains[0])
+            ])
+        )
         .add_extension(
             x509.SubjectAlternativeName(
                 [x509.DNSName(d) for d in domains]