diff --git a/wwwroot/api/cockpit_context_update.dspy b/wwwroot/api/cockpit_context_update.dspy
index 6e285c7..039f30a 100644
--- a/wwwroot/api/cockpit_context_update.dspy
+++ b/wwwroot/api/cockpit_context_update.dspy
@@ -17,6 +17,28 @@ if not pid and not iid:
 
 dbname = get_module_dbname('pipeline-sdlc')
 
+# 归属门禁（2026-09-18 银联事故实锤）：旧版无校验，任何登录用户可把**他机构**
+# 项目 id 写进自己的会话指针（cockpit 上下文栏直传），随后工作空间列表/读文件
+# 端点按指针解析目录 → 看到他机构项目文件。校验对齐 agent_project_popup 切换
+# 门禁：同机构 + 本人创建（owner.superuser 放行，与 _check_confirm_operator 同口径）。
+if pid:
+    async with DBPools().sqlorContext(dbname) as _gsor:
+        _pr = await _gsor.sqlExe(
+            "SELECT org_id, created_by FROM sd_projects WHERE id=${p}$ LIMIT 1", {"p": pid})
+        await _gsor.sqlExe("COMMIT", {})
+        if not _pr:
+            return json.dumps({"success": False, "error": "项目不存在"}, ensure_ascii=False)
+        _porg = getattr(_pr[0], 'org_id', '') or ''
+        _pby = getattr(_pr[0], 'created_by', '') or ''
+        _uorg = await get_userorgid() or ''
+        if _pby != uid:
+            from pipeline_service.human_task_capability import _get_user_roles
+            _roles = await _get_user_roles(_gsor, uid)
+            if "owner.superuser" not in _roles or (_porg and _uorg != _porg):
+                return json.dumps({"success": False,
+                                   "error": "无权切换到该项目（仅限本人创建的项目）"},
+                                  ensure_ascii=False)
+
 async with DBPools().sqlorContext(dbname) as sor:
     # Upsert agent_settings
     existing = await sor.sqlExe(
diff --git a/wwwroot/api/cockpit_project_picker.dspy b/wwwroot/api/cockpit_project_picker.dspy
index c82fe99..c6e44b6 100644
--- a/wwwroot/api/cockpit_project_picker.dspy
+++ b/wwwroot/api/cockpit_project_picker.dspy
@@ -1,12 +1,23 @@
-# cockpit_project_picker.dspy - Returns all projects as {value, text} for dropdown
+# cockpit_project_picker.dspy - Returns projects as {value, text} for dropdown
 # Used by cockpit context bar project picker
+#
+# 跨租户修复（2026-09-18 银联事故实锤）：旧版全表无过滤，任何登录用户能枚举
+# 全部机构的全部项目（含他机构标书项目），配合 cockpit_context_update 无归属
+# 校验可把他机构项目写进自己的会话指针 → 工作空间/读文件端点随之越权看到他
+# 机构文件。可见范围对齐 agent_project_popup 切换门禁（用户 2026-09-11 拍板）：
+# 本产线 + 本人创建。
 
 dbname = get_module_dbname('pipeline-sdlc')
 
+uid = await get_user()
+if not uid:
+    return []
+
 async with DBPools().sqlorContext(dbname) as sor:
     recs = await sor.sqlExe(
-        "SELECT id, name FROM sd_projects WHERE pipeline_id='sdlc_general' ORDER BY name",
-        {}
+        "SELECT id, name FROM sd_projects WHERE pipeline_id='sdlc_general' "
+        "AND created_by=${u}$ ORDER BY name",
+        {"u": uid}
     )
 
 rows = []