diff --git a/pkg/exectest/helm.go b/pkg/exectest/helm.go
index 9daaf0ec..eb7efb73 100644
--- a/pkg/exectest/helm.go
+++ b/pkg/exectest/helm.go
@@ -30,6 +30,7 @@ type DiffKey struct {
 type Helm struct {
 	Charts               []string
 	Repo                 []string
+	RegistryLoginHost    string // Captures the registry host for OCI login
 	Releases             []Release
 	Deleted              []Release
 	Linted               []Release
@@ -104,6 +105,7 @@ func (helm *Helm) UpdateRepo() error {
 	return nil
 }
 func (helm *Helm) RegistryLogin(name, username, password, caFile, certFile, keyFile string, skipTLSVerify bool) error {
+	helm.RegistryLoginHost = name
 	return nil
 }
 func (helm *Helm) SyncRelease(context helmexec.HelmContext, name, chart, namespace string, flags ...string) error {
diff --git a/pkg/state/state.go b/pkg/state/state.go
index d8e4013c..f3757142 100644
--- a/pkg/state/state.go
+++ b/pkg/state/state.go
@@ -592,7 +592,10 @@ func (st *HelmState) SyncRepos(helm RepoUpdater, shouldSkip map[string]bool) ([]
 		username, password := gatherUsernamePassword(repo.Name, repo.Username, repo.Password)
 		var err error
 		if repo.OCI {
-			err = helm.RegistryLogin(repo.URL, username, password, repo.CaFile, repo.CertFile, repo.KeyFile, repo.SkipTLSVerify)
+			// For OCI registries, extract just the registry host for login
+			// helm registry login expects "registry.io" not "registry.io/org/path"
+			registryHost := extractRegistryHost(repo.URL)
+			err = helm.RegistryLogin(registryHost, username, password, repo.CaFile, repo.CertFile, repo.KeyFile, repo.SkipTLSVerify)
 		} else {
 			err = helm.AddRepo(repo.Name, repo.URL, repo.CaFile, repo.CertFile, repo.KeyFile, username, password, repo.Managed, repo.PassCredentials, repo.SkipTLSVerify)
 		}
@@ -607,6 +610,23 @@ func (st *HelmState) SyncRepos(helm RepoUpdater, shouldSkip map[string]bool) ([]
 	return updated, nil
 }
 
+// extractRegistryHost extracts the registry hostname (and optional port) from a URL.
+// For OCI registries, helm registry login requires just the host, not the full path.
+// Examples:
+//   - "quay.io/org/repo" -> "quay.io"
+//   - "registry:443/helm-charts" -> "registry:443"
+//   - "myregistry.azurecr.io" -> "myregistry.azurecr.io"
+func extractRegistryHost(repoURL string) string {
+	// Find the first slash after the initial part
+	slashIndex := strings.Index(repoURL, "/")
+	if slashIndex == -1 {
+		// No slash, return the whole URL
+		return repoURL
+	}
+	// Return everything before the first slash
+	return repoURL[:slashIndex]
+}
+
 func gatherUsernamePassword(repoName string, username string, password string) (string, string) {
 	var user, pass string
 
diff --git a/pkg/state/state_test.go b/pkg/state/state_test.go
index a02ea593..6846a0df 100644
--- a/pkg/state/state_test.go
+++ b/pkg/state/state_test.go
@@ -1248,6 +1248,103 @@ func TestHelmState_SyncRepos(t *testing.T) {
 	}
 }
 
+func TestHelmState_SyncRepos_OCI(t *testing.T) {
+	tests := []struct {
+		name             string
+		repos            []RepositorySpec
+		envs             map[string]string
+		wantRegistryHost string
+	}{
+		{
+			name: "OCI registry with organization path",
+			repos: []RepositorySpec{
+				{
+					Name:     "ociregistry",
+					URL:      "quay.io/ORG_NAME",
+					OCI:      true,
+					Username: "testuser",
+					Password: "testpass",
+				},
+			},
+			wantRegistryHost: "quay.io",
+		},
+		{
+			name: "OCI registry with multiple path segments",
+			repos: []RepositorySpec{
+				{
+					Name:     "myregistry",
+					URL:      "registry.example.com/org/team/repo",
+					OCI:      true,
+					Username: "user",
+					Password: "pass",
+				},
+			},
+			wantRegistryHost: "registry.example.com",
+		},
+		{
+			name: "OCI registry without path",
+			repos: []RepositorySpec{
+				{
+					Name:     "simpleregistry",
+					URL:      "myregistry.azurecr.io",
+					OCI:      true,
+					Username: "azureuser",
+					Password: "azurepass",
+				},
+			},
+			wantRegistryHost: "myregistry.azurecr.io",
+		},
+		{
+			name: "OCI registry with port and path",
+			repos: []RepositorySpec{
+				{
+					Name:     "localregistry",
+					URL:      "localhost:5000/charts",
+					OCI:      true,
+					Username: "local",
+					Password: "local",
+				},
+			},
+			wantRegistryHost: "localhost:5000",
+		},
+		{
+			name: "OCI registry with environment credentials",
+			repos: []RepositorySpec{
+				{
+					Name: "envregistry",
+					URL:  "registry.io/org",
+					OCI:  true,
+				},
+			},
+			envs: map[string]string{
+				"ENVREGISTRY_USERNAME": "envuser",
+				"ENVREGISTRY_PASSWORD": "envpass",
+			},
+			wantRegistryHost: "registry.io",
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			for k, v := range tt.envs {
+				t.Setenv(k, v)
+			}
+			helm := &exectest.Helm{}
+			state := &HelmState{
+				ReleaseSetSpec: ReleaseSetSpec{
+					Repositories: tt.repos,
+				},
+			}
+			_, err := state.SyncRepos(helm, map[string]bool{})
+			if err != nil {
+				t.Errorf("HelmState.SyncRepos() error = %v", err)
+			}
+			if helm.RegistryLoginHost != tt.wantRegistryHost {
+				t.Errorf("HelmState.SyncRepos() RegistryLoginHost = %q, want %q", helm.RegistryLoginHost, tt.wantRegistryHost)
+			}
+		})
+	}
+}
+
 func TestHelmState_SyncReleases(t *testing.T) {
 	postRenderer := "foo.sh"
 	tests := []struct {
@@ -3095,6 +3192,53 @@ func TestReverse(t *testing.T) {
 	}
 }
 
+func Test_extractRegistryHost(t *testing.T) {
+	tests := []struct {
+		name     string
+		repoURL  string
+		expected string
+	}{
+		{
+			name:     "URL with organization and repository path",
+			repoURL:  "quay.io/ORG_NAME",
+			expected: "quay.io",
+		},
+		{
+			name:     "URL with registry port and path",
+			repoURL:  "registry:443/helm-charts",
+			expected: "registry:443",
+		},
+		{
+			name:     "URL with multiple path segments",
+			repoURL:  "registry.io/org/repo/subpath",
+			expected: "registry.io",
+		},
+		{
+			name:     "URL with registry only, no path",
+			repoURL:  "myregistry.azurecr.io",
+			expected: "myregistry.azurecr.io",
+		},
+		{
+			name:     "URL with registry and port only",
+			repoURL:  "localhost:5000",
+			expected: "localhost:5000",
+		},
+		{
+			name:     "Docker Hub style URL",
+			repoURL:  "registry-1.docker.io/library",
+			expected: "registry-1.docker.io",
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got := extractRegistryHost(tt.repoURL)
+			if got != tt.expected {
+				t.Errorf("extractRegistryHost(%q) = %q, want %q", tt.repoURL, got, tt.expected)
+			}
+		})
+	}
+}
+
 func Test_gatherUsernamePassword(t *testing.T) {
 	type args struct {
 		repoName string