diff --git a/docs/api/control-plane.md b/docs/api/control-plane.md
index e576b48..e68da05 100644
--- a/docs/api/control-plane.md
+++ b/docs/api/control-plane.md
@@ -242,7 +242,8 @@ Gateway 不复用 `controlPlane.listen` 作为客户端地址。`listen` 是 Con
 
 当 `controlPlane.tls.mode=mtls` 时，Gateway 使用 `controlPlane.gatewayTLS` 中独立的
 客户端证书、私钥和 Controller CA 发起 TLS 1.3 连接；证书必须符合 Controller 的
-SPIFFE Worker 身份校验。
+SPIFFE Worker 身份校验。Gateway 自动解析和 Controller 授权共用严格 URI 规则：身份 URI
+不得包含用户信息、端口、查询、片段或转义路径。
 `disabled` 仅接受回环控制面地址，供本地 fixture 使用。
 
 ## 10. Checker 启动参数
diff --git a/internal/controller/worker/identity.go b/internal/controller/worker/identity.go
index 3e49ddc..200145f 100644
--- a/internal/controller/worker/identity.go
+++ b/internal/controller/worker/identity.go
@@ -8,6 +8,8 @@ import (
 
 	"google.golang.org/grpc/credentials"
 	"google.golang.org/grpc/peer"
+
+	"proxy-pool/internal/domain/workerruntime"
 )
 
 var ErrUnauthorizedIdentity = errors.New("control-plane identity is not authorized")
@@ -57,22 +59,18 @@ func (authorizer *SPIFFEIdentityAuthorizer) authorize(ctx context.Context, resou
 		return ErrUnauthorizedIdentity
 	}
 
-	expectedPath := "/" + authorizer.environment + "/" + resourceType + "/" + resourceID
 	identityCount := 0
 	for _, chain := range tlsInfo.State.VerifiedChains {
 		if len(chain) == 0 || chain[0] == nil {
 			continue
 		}
 		for _, uri := range chain[0].URIs {
-			if uri == nil || uri.Scheme != "spiffe" || uri.Host != authorizer.trustDomain {
-				continue
-			}
-			segments := strings.Split(strings.Trim(uri.Path, "/"), "/")
-			if len(segments) != 3 || segments[1] != resourceType {
+			identity, matches := workerruntime.SPIFFEIdentity(uri, authorizer.trustDomain, authorizer.environment, resourceType)
+			if !matches {
 				continue
 			}
 			identityCount++
-			if identityCount > 1 || uri.RawQuery != "" || uri.Fragment != "" || uri.Path != expectedPath {
+			if identityCount > 1 || identity != resourceID {
 				return ErrUnauthorizedIdentity
 			}
 		}
diff --git a/internal/controller/worker/identity_test.go b/internal/controller/worker/identity_test.go
index b434be1..75aaf94 100644
--- a/internal/controller/worker/identity_test.go
+++ b/internal/controller/worker/identity_test.go
@@ -28,6 +28,8 @@ func TestSPIFFEIdentityAuthorizer(t *testing.T) {
 		{name: "different worker", workerID: "worker-a", uri: "spiffe://proxy.example/prod/worker/worker-b", withTLS: true, wantError: true},
 		{name: "different environment", workerID: "worker-a", uri: "spiffe://proxy.example/staging/worker/worker-a", withTLS: true, wantError: true},
 		{name: "different trust domain", workerID: "worker-a", uri: "spiffe://other.example/prod/worker/worker-a", withTLS: true, wantError: true},
+		{name: "uri query is rejected", workerID: "worker-a", uri: "spiffe://proxy.example/prod/worker/worker-a?scope=ignored", withTLS: true, wantError: true},
+		{name: "uri user info is rejected", workerID: "worker-a", uri: "spiffe://worker@proxy.example/prod/worker/worker-a", withTLS: true, wantError: true},
 		{name: "missing peer tls", workerID: "worker-a", wantError: true},
 	}
 
diff --git a/internal/controlplane/tlsreload/identity.go b/internal/controlplane/tlsreload/identity.go
index eced2bc..3115742 100644
--- a/internal/controlplane/tlsreload/identity.go
+++ b/internal/controlplane/tlsreload/identity.go
@@ -6,7 +6,6 @@ import (
 	"errors"
 	"fmt"
 	"net/url"
-	"strings"
 
 	"proxy-pool/internal/domain/workerruntime"
 )
@@ -46,12 +45,5 @@ func ResolveSPIFFEIdentity(certificateFile, keyFile, trustDomain, environment, r
 }
 
 func spiffeIdentity(uri *url.URL, trustDomain, environment, role string) (string, bool) {
-	if uri == nil || uri.Scheme != "spiffe" || uri.Host != trustDomain || uri.RawQuery != "" || uri.Fragment != "" {
-		return "", false
-	}
-	segments := strings.Split(strings.Trim(uri.Path, "/"), "/")
-	if len(segments) != 3 || segments[0] != environment || segments[1] != role || !workerruntime.ValidIdentifier(segments[2]) {
-		return "", false
-	}
-	return segments[2], true
+	return workerruntime.SPIFFEIdentity(uri, trustDomain, environment, role)
 }
diff --git a/internal/domain/workerruntime/spiffe.go b/internal/domain/workerruntime/spiffe.go
new file mode 100644
index 0000000..1e9a7b2
--- /dev/null
+++ b/internal/domain/workerruntime/spiffe.go
@@ -0,0 +1,22 @@
+package workerruntime
+
+import (
+	"net/url"
+	"strings"
+)
+
+// SPIFFEIdentity returns the ID from an exact workload SPIFFE URI SAN. The
+// control plane accepts no URI decorations so certificate parsing and server
+// authorization use the same identity boundary.
+func SPIFFEIdentity(uri *url.URL, trustDomain, environment, role string) (string, bool) {
+	if uri == nil || trustDomain == "" || environment == "" || (role != "worker" && role != "checker") ||
+		uri.Scheme != "spiffe" || uri.Host != trustDomain || uri.User != nil || uri.Port() != "" ||
+		uri.Opaque != "" || uri.RawPath != "" || uri.RawQuery != "" || uri.ForceQuery || uri.Fragment != "" {
+		return "", false
+	}
+	segments := strings.Split(uri.Path, "/")
+	if len(segments) != 4 || segments[0] != "" || segments[1] != environment || segments[2] != role || !ValidIdentifier(segments[3]) {
+		return "", false
+	}
+	return segments[3], true
+}
diff --git a/internal/domain/workerruntime/validation_test.go b/internal/domain/workerruntime/validation_test.go
index 0f30a39..c851bdc 100644
--- a/internal/domain/workerruntime/validation_test.go
+++ b/internal/domain/workerruntime/validation_test.go
@@ -3,10 +3,39 @@ package workerruntime
 import (
 	"crypto/sha256"
 	"errors"
+	"net/url"
 	"testing"
 	"time"
 )
 
+func TestSPIFFEIdentityAcceptsOnlyExactWorkloadURI(t *testing.T) {
+	tests := []struct {
+		name string
+		raw  string
+		want string
+	}{
+		{name: "exact worker", raw: "spiffe://proxy.example/prod/worker/worker-a", want: "worker-a"},
+		{name: "checker is not worker", raw: "spiffe://proxy.example/prod/checker/checker-a"},
+		{name: "query", raw: "spiffe://proxy.example/prod/worker/worker-a?scope=ignored"},
+		{name: "user info", raw: "spiffe://worker@proxy.example/prod/worker/worker-a"},
+		{name: "port", raw: "spiffe://proxy.example:8443/prod/worker/worker-a"},
+		{name: "trailing slash", raw: "spiffe://proxy.example/prod/worker/worker-a/"},
+		{name: "escaped path", raw: "spiffe://proxy.example/prod/worker/worker%2Da"},
+	}
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			uri, err := url.Parse(test.raw)
+			if err != nil {
+				t.Fatal(err)
+			}
+			got, ok := SPIFFEIdentity(uri, "proxy.example", "prod", "worker")
+			if (test.want != "") != ok || got != test.want {
+				t.Fatalf("SPIFFEIdentity() = (%q, %t), want (%q, %t)", got, ok, test.want, test.want != "")
+			}
+		})
+	}
+}
+
 func TestNormalizeLabelsClonesAndBoundsValues(t *testing.T) {
 	source := map[string]string{"region": "cn-north"}
 	labels, err := NormalizeLabels(source)
diff --git a/progress.md b/progress.md
index b5a1f3d..b565cf9 100644
--- a/progress.md
+++ b/progress.md
@@ -6,6 +6,8 @@
   `PROXY_POOL_AUTO_IDENTITY=true` 时只接受与信任域、环境和角色精确匹配的唯一 SPIFFE URI，
   并在显式 ID 不匹配时拒绝启动。Compose 与 Kubernetes 开发 mTLS Overlay 已移除手工 ID，
   改由挂载证书派生；定向 Go、文档、Compose、Kustomize 与严格配置校验均通过。
+- SPIFFE URI 解析已下沉到 `workerruntime.SPIFFEIdentity`，Controller 授权和客户端
+  自动派生共用同一边界；用户信息、端口、查询、片段、转义路径和非精确角色路径均拒绝。
 - Gateway 静态 `routing.action: direct` 已贯通严格配置、控制面协议、完整 Snapshot、
   HTTP/CONNECT 转发和目标地址策略。直连请求不会申请 Proxy 容量、创建粘性绑定或上报
   Proxy Outcome；`onUnavailable.action: direct` 仍保留为代理无候选时的独立回退语义。