diff --git a/modules/setting/packages.go b/modules/setting/packages.go
index b225615a2..00fba67b3 100644
--- a/modules/setting/packages.go
+++ b/modules/setting/packages.go
@@ -6,7 +6,6 @@ package setting
 import (
 	"fmt"
 	"math"
-	"net/url"
 	"os"
 	"path/filepath"
 
@@ -19,7 +18,6 @@ var (
 		Storage           *Storage
 		Enabled           bool
 		ChunkedUploadPath string
-		RegistryHost      string
 
 		LimitTotalOwnerCount int64
 		LimitTotalOwnerSize  int64
@@ -66,9 +64,6 @@ func loadPackagesFrom(rootCfg ConfigProvider) (err error) {
 		return err
 	}
 
-	appURL, _ := url.Parse(AppURL)
-	Packages.RegistryHost = appURL.Host
-
 	Packages.ChunkedUploadPath = filepath.ToSlash(sec.Key("CHUNKED_UPLOAD_PATH").MustString("tmp/package-upload"))
 	if !filepath.IsAbs(Packages.ChunkedUploadPath) {
 		Packages.ChunkedUploadPath = filepath.ToSlash(filepath.Join(AppDataPath, Packages.ChunkedUploadPath))
diff --git a/modules/test/utils.go b/modules/test/utils.go
index 4a0c2f1b3..8dee92fbc 100644
--- a/modules/test/utils.go
+++ b/modules/test/utils.go
@@ -34,8 +34,10 @@ func IsNormalPageCompleted(s string) bool {
 	return strings.Contains(s, `<footer class="page-footer"`) && strings.Contains(s, `</html>`)
 }
 
-func MockVariableValue[T any](p *T, v T) (reset func()) {
+func MockVariableValue[T any](p *T, v ...T) (reset func()) {
 	old := *p
-	*p = v
+	if len(v) > 0 {
+		*p = v[0]
+	}
 	return func() { *p = old }
 }
diff --git a/routers/api/packages/container/container.go b/routers/api/packages/container/container.go
index 2a6d44ba0..b0c4458d5 100644
--- a/routers/api/packages/container/container.go
+++ b/routers/api/packages/container/container.go
@@ -116,9 +116,9 @@ func apiErrorDefined(ctx *context.Context, err *namedError) {
 }
 
 func apiUnauthorizedError(ctx *context.Context) {
-	// TODO: it doesn't seem quite right but it doesn't really cause problem at the moment.
-	// container registry requires that the "/v2" must be in the root, so the sub-path in AppURL should be removed, ideally.
-	ctx.Resp.Header().Add("WWW-Authenticate", `Bearer realm="`+httplib.GuessCurrentAppURL(ctx)+`v2/token",service="container_registry",scope="*"`)
+	// container registry requires that the "/v2" must be in the root, so the sub-path in AppURL should be removed
+	realmURL := strings.TrimSuffix(httplib.GuessCurrentAppURL(ctx), setting.AppSubURL+"/") + "/v2/token"
+	ctx.Resp.Header().Add("WWW-Authenticate", `Bearer realm="`+realmURL+`",service="container_registry",scope="*"`)
 	apiErrorDefined(ctx, errUnauthorized)
 }
 
diff --git a/routers/web/user/package.go b/routers/web/user/package.go
index 2a1879668..dad4c8f60 100644
--- a/routers/web/user/package.go
+++ b/routers/web/user/package.go
@@ -5,6 +5,7 @@ package user
 
 import (
 	"net/http"
+	"net/url"
 
 	"code.gitea.io/gitea/models/db"
 	org_model "code.gitea.io/gitea/models/organization"
@@ -15,6 +16,7 @@ import (
 	repo_model "code.gitea.io/gitea/models/repo"
 	"code.gitea.io/gitea/modules/base"
 	"code.gitea.io/gitea/modules/container"
+	"code.gitea.io/gitea/modules/httplib"
 	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/optional"
 	alpine_module "code.gitea.io/gitea/modules/packages/alpine"
@@ -178,7 +180,11 @@ func ViewPackageVersion(ctx *context.Context) {
 
 	switch pd.Package.Type {
 	case packages_model.TypeContainer:
-		ctx.Data["RegistryHost"] = setting.Packages.RegistryHost
+		registryAppURL, err := url.Parse(httplib.GuessCurrentAppURL(ctx))
+		if err != nil {
+			registryAppURL, _ = url.Parse(setting.AppURL)
+		}
+		ctx.Data["RegistryHost"] = registryAppURL.Host
 	case packages_model.TypeAlpine:
 		branches := make(container.Set[string])
 		repositories := make(container.Set[string])
diff --git a/tests/integration/api_packages_container_test.go b/tests/integration/api_packages_container_test.go
index 9ac6e5256..fcd1cc529 100644
--- a/tests/integration/api_packages_container_test.go
+++ b/tests/integration/api_packages_container_test.go
@@ -84,7 +84,7 @@ func TestPackageContainer(t *testing.T) {
 			Token string `json:"token"`
 		}
 
-		authenticate := []string{`Bearer realm="` + setting.AppURL + `v2/token",service="container_registry",scope="*"`}
+		defaultAuthenticateValues := []string{`Bearer realm="` + setting.AppURL + `v2/token",service="container_registry",scope="*"`}
 
 		t.Run("Anonymous", func(t *testing.T) {
 			defer tests.PrintCurrentTest(t)()
@@ -92,7 +92,7 @@ func TestPackageContainer(t *testing.T) {
 			req := NewRequest(t, "GET", fmt.Sprintf("%sv2", setting.AppURL))
 			resp := MakeRequest(t, req, http.StatusUnauthorized)
 
-			assert.ElementsMatch(t, authenticate, resp.Header().Values("WWW-Authenticate"))
+			assert.ElementsMatch(t, defaultAuthenticateValues, resp.Header().Values("WWW-Authenticate"))
 
 			req = NewRequest(t, "GET", fmt.Sprintf("%sv2/token", setting.AppURL))
 			resp = MakeRequest(t, req, http.StatusOK)
@@ -115,6 +115,12 @@ func TestPackageContainer(t *testing.T) {
 
 			req = NewRequest(t, "GET", fmt.Sprintf("%sv2/token", setting.AppURL))
 			MakeRequest(t, req, http.StatusUnauthorized)
+
+			defer test.MockVariableValue(&setting.AppURL, "https://domain:8443/sub-path/")()
+			defer test.MockVariableValue(&setting.AppSubURL, "/sub-path")()
+			req = NewRequest(t, "GET", "/v2")
+			resp = MakeRequest(t, req, http.StatusUnauthorized)
+			assert.Equal(t, `Bearer realm="https://domain:8443/v2/token",service="container_registry",scope="*"`, resp.Header().Get("WWW-Authenticate"))
 		})
 
 		t.Run("User", func(t *testing.T) {
@@ -123,7 +129,7 @@ func TestPackageContainer(t *testing.T) {
 			req := NewRequest(t, "GET", fmt.Sprintf("%sv2", setting.AppURL))
 			resp := MakeRequest(t, req, http.StatusUnauthorized)
 
-			assert.ElementsMatch(t, authenticate, resp.Header().Values("WWW-Authenticate"))
+			assert.ElementsMatch(t, defaultAuthenticateValues, resp.Header().Values("WWW-Authenticate"))
 
 			req = NewRequest(t, "GET", fmt.Sprintf("%sv2/token", setting.AppURL)).
 				AddBasicAuth(user.Name)