diff --git a/src/handlers/identity.ts b/src/handlers/identity.ts
index 17fe05f..f66784d 100644
--- a/src/handlers/identity.ts
+++ b/src/handlers/identity.ts
@@ -163,6 +163,30 @@ function withWebRefreshCookie(request: Request, response: Response, refreshToken
   });
 }
 
+async function revokePresentedAccessTokenSession(request: Request, env: Env, storage: StorageService): Promise<void> {
+  const authHeader = request.headers.get('Authorization');
+  if (!authHeader) return;
+
+  const auth = new AuthService(env);
+  const verified = await auth.verifyAccessTokenWithUser(authHeader);
+  if (!verified) return;
+
+  const deviceIdentifier = String(verified.payload.did || '').trim();
+  if (deviceIdentifier) {
+    const nextSessionStamp = generateUUID();
+    await storage.rotateDeviceSessionStamp(verified.user.id, deviceIdentifier, nextSessionStamp);
+    await storage.deleteRefreshTokensByDevice(verified.user.id, deviceIdentifier);
+    AuthService.invalidateDeviceCache(verified.user.id, deviceIdentifier);
+    return;
+  }
+
+  verified.user.securityStamp = generateUUID();
+  verified.user.updatedAt = new Date().toISOString();
+  await storage.saveUser(verified.user);
+  await storage.deleteRefreshTokensByUserId(verified.user.id);
+  AuthService.invalidateUserCache(verified.user.id);
+}
+
 function buildPreloginResponse(
   email: string,
   kdfType: number,
@@ -1010,6 +1034,11 @@ export async function handlePrelogin(request: Request, env: Env): Promise<Respon
 // RFC 7009 allows returning 200 even if token is unknown.
 export async function handleRevocation(request: Request, env: Env): Promise<Response> {
   const storage = new StorageService(env.DB);
+  try {
+    await revokePresentedAccessTokenSession(request, env, storage);
+  } catch {
+    // RFC 7009 revocation is best-effort and should not reveal token state.
+  }
 
   let body: Record<string, string>;
   const contentType = request.headers.get('content-type') || '';
diff --git a/src/services/storage-device-repo.ts b/src/services/storage-device-repo.ts
index 3bd33fa..bdd4f8c 100644
--- a/src/services/storage-device-repo.ts
+++ b/src/services/storage-device-repo.ts
@@ -97,6 +97,20 @@ export async function touchDeviceLastSeen(
   return Number(result.meta.changes ?? 0) > 0;
 }
 
+export async function rotateDeviceSessionStamp(
+  db: D1Database,
+  userId: string,
+  deviceIdentifier: string,
+  sessionStamp: string
+): Promise<boolean> {
+  const now = new Date().toISOString();
+  const result = await db
+    .prepare('UPDATE devices SET session_stamp = ?, updated_at = ? WHERE user_id = ? AND device_identifier = ?')
+    .bind(sessionStamp, now, userId, deviceIdentifier)
+    .run();
+  return Number(result.meta.changes ?? 0) > 0;
+}
+
 export async function updateDeviceKeys(
   db: D1Database,
   userId: string,
diff --git a/src/services/storage.ts b/src/services/storage.ts
index 473f392..ae92062 100644
--- a/src/services/storage.ts
+++ b/src/services/storage.ts
@@ -109,6 +109,7 @@ import {
   isKnownDevice as getKnownStoredDevice,
   isKnownDeviceByEmail as getKnownStoredDeviceByEmail,
   saveTrustedTwoFactorDeviceToken as saveStoredTrustedDeviceToken,
+  rotateDeviceSessionStamp as rotateStoredDeviceSessionStamp,
   touchDeviceLastSeen as touchStoredDeviceLastSeen,
   upsertDevice as saveStoredDevice,
   updateDeviceName as updateStoredDeviceName,
@@ -761,6 +762,10 @@ export class StorageService {
     return findStoredDevice(this.db, userId, deviceIdentifier);
   }
 
+  async rotateDeviceSessionStamp(userId: string, deviceIdentifier: string, sessionStamp: string): Promise<boolean> {
+    return rotateStoredDeviceSessionStamp(this.db, userId, deviceIdentifier, sessionStamp);
+  }
+
   async updateDeviceKeys(
     userId: string,
     deviceIdentifier: string,
diff --git a/webapp/src/lib/api/auth.ts b/webapp/src/lib/api/auth.ts
index 8cd895c..81a9e3f 100644
--- a/webapp/src/lib/api/auth.ts
+++ b/webapp/src/lib/api/auth.ts
@@ -402,6 +402,7 @@ export async function revokeCurrentSession(session: SessionState | null): Promis
     method: 'POST',
     headers: {
       'Content-Type': 'application/x-www-form-urlencoded',
+      ...(session?.accessToken ? { Authorization: `Bearer ${session.accessToken}` } : {}),
       ...(session?.authMode === 'web-cookie' ? { [WEB_SESSION_HEADER]: '1' } : {}),
     },
     body: body.toString(),