diff --git a/src/cli/main.py b/src/cli/main.py
index 7ce454b..a1a823c 100644
--- a/src/cli/main.py
+++ b/src/cli/main.py
@@ -17,7 +17,7 @@ if sys.stdout.encoding != "utf-8":
 sys.path.insert(0, str(Path(__file__).parent.parent))
 
 from src.core.config import DEFAULT_CONFIG_PATH
-from src.core.security import is_safe_path
+from src.core.security import is_path_within_workspace
 from src.server.deps import get_state, get_default_collection
 
 app = typer.Typer(
@@ -82,7 +82,7 @@ def ingest(
     if file_paths:
         total = 0
         for fp in file_paths:
-            if not is_safe_path(fp):
+            if not is_path_within_workspace(fp):
                 typer.echo(f"[SKIP] 不安全的路径: {fp}", err=True)
                 continue
             # 支持通配符 (shell 展开或 Python glob)
@@ -90,7 +90,7 @@ def ingest(
             if "*" in fp or "?" in fp:
                 matches = _glob.glob(fp, recursive=True)
                 for m in matches:
-                    if not is_safe_path(m):
+                    if not is_path_within_workspace(m):
                         typer.echo(f"[SKIP] 不安全的路径: {m}", err=True)
                         continue
                     c = ingestor.ingest_file(m)
@@ -117,7 +117,7 @@ def ingest_dir(
     collection: CollectionOpt = None,
 ):
     _init_config(config)
-    if not is_safe_path(dir_path):
+    if not is_path_within_workspace(dir_path):
         typer.echo(f"错误: 不安全的路径 — {dir_path}", err=True)
         raise typer.Exit(code=1)
     state = get_state()
diff --git a/src/core/security.py b/src/core/security.py
index 4a856ff..22aaec0 100644
--- a/src/core/security.py
+++ b/src/core/security.py
@@ -26,3 +26,23 @@ def is_safe_path(path_str: str) -> bool:
         return False
 
     return True
+
+
+def is_path_within_workspace(path_str: str) -> bool:
+    """检查路径是否在当前工作目录内（防路径穿越 + 目录绑定）.
+
+    同时检查：
+    1. 路径不含 .. 穿越组件且非绝对路径
+    2. resolve 后的路径位于当前工作目录内
+    """
+    if not is_safe_path(path_str):
+        return False
+
+    from pathlib import Path
+    path = Path(path_str).resolve()
+    cwd = Path.cwd().resolve()
+    try:
+        common = Path(os.path.commonpath([str(path), str(cwd)]))
+    except ValueError:
+        return False
+    return common == cwd
diff --git a/src/server/app.py b/src/server/app.py
index 165f446..4fb45c9 100644
--- a/src/server/app.py
+++ b/src/server/app.py
@@ -10,7 +10,7 @@ from fastapi.middleware.cors import CORSMiddleware
 from fastapi.responses import RedirectResponse
 from pydantic import BaseModel, Field, model_validator
 
-from src.core.security import is_safe_path
+from src.core.security import is_path_within_workspace
 from src.server.auth import verify_api_key, rate_limiter
 from src.server.deps import get_state, AppState
 
@@ -117,17 +117,9 @@ def ingest_document(
     ingestor = state.get_ingestor(req.collection)
     try:
         if req.file_path:
-            if not is_safe_path(req.file_path):
+            if not is_path_within_workspace(req.file_path):
                 raise HTTPException(status_code=400, detail="不允许的路径")
             path = Path(req.file_path).resolve()
-            cwd = Path.cwd().resolve()
-            # 用 commonpath 替代字符串 startswith 比较 (Windows 大小写安全)
-            try:
-                common = Path(os.path.commonpath([str(path), str(cwd)]))
-            except ValueError:
-                raise HTTPException(status_code=400, detail="不允许访问当前目录外的路径")
-            if common != cwd:
-                raise HTTPException(status_code=400, detail="不允许访问当前目录外的路径")
             if not path.exists():
                 raise HTTPException(status_code=404, detail=f"文件不存在: {path.name}")
             count = ingestor.ingest_file(str(path))