CVE-2026-42079

@@ -23,6 +23,7 @@
 
 logger = get_logger(__name__)
 TABLE_REGEX = re.compile(r".*table_[0-9a-fA-F]{4}\.png$")
+SAFE_EVAL_GLOBALS = {"__builtins__": {}}
 
 
 class SlideRenderer(HTMLRenderer):
@@ -182,7 +183,7 @@ def execute_actions(
                 partial_func = partial(self.registered_functions[func], edit_slide)
                 if func == "replace_image":
                     partial_func = partial(partial_func, doc)
-                eval(line, {}, {func: partial_func})
+                eval(line, SAFE_EVAL_GLOBALS, {func: partial_func})
                 self.code_history[-1][0] = HistoryMark.CODE_RUN_CORRECT
             except Exception as e:
                 if not isinstance(e, SlideEditError):

@@ -23,6 +23,7 @@
     get_html_table_image,
     get_logger,
     package_join,
+    resolve_path_in_workspace,
 )
 
 logger = get_logger(__name__)
@@ -291,13 +292,13 @@ async def save_generated_slides(pptx_path: str):
             Args:
                 pptx_path: The path to save the PowerPoint file
             """
-            pptx = Path(pptx_path)
+            pptx = resolve_path_in_workspace(pptx_path)
             assert len(self.slides), (
                 "No slides generated, please call `generate_slide` first"
             )
             pptx.parent.mkdir(parents=True, exist_ok=True)
             self.empty_prs.slides = self.slides
-            self.empty_prs.save(pptx_path)
+            self.empty_prs.save(str(pptx))
             self.slides = []
             self._initialized = False
             return f"total {len(self.empty_prs.slides)} slides saved to {pptx}"

@@ -98,6 +98,28 @@ def get_logger(name="pptagent", level=None):
         "unoconvert/soffice is not installed, pptx to images conversion will not work"
     )
 
+
+def resolve_path_in_workspace(path_str: str, workspace: Path | None = None) -> Path:
+    """
+    Resolve a path and ensure it stays inside the active workspace.
+
+    Args:
+        path_str (str): User-provided file path.
+        workspace (Path | None): Allowed workspace root. Defaults to current working
+            directory.
+
+    Returns:
+        Path: Resolved path within the workspace.
+    """
+    workspace_root = (workspace or Path.cwd()).resolve()
+    target = Path(path_str).resolve()
+    if not target.is_relative_to(workspace_root):
+        raise ValueError(
+            f"Access denied: path outside allowed workspace: {workspace_root}"
+        )
+    return target
+
+
 # Set of supported image extensions
 IMAGE_EXTENSIONS: set[str] = {
     "bmp",
@@ -347,7 +369,8 @@ def get_html_table_image(html: str, output_path: str, css: str = None):
     """
     if css is None:
         css = TABLE_CSS
-    parent_dir, base_name = os.path.split(output_path)
+    output_file = resolve_path_in_workspace(output_path)
+    parent_dir, base_name = os.path.split(output_file)
 
     if parent_dir and not os.path.exists(parent_dir):
         os.makedirs(parent_dir)
@@ -364,7 +387,7 @@ def get_html_table_image(html: str, output_path: str, css: str = None):
         save_as=base_name,
         size=(1000, 600),
     )
-    manual_scan_crop(output_path)
+    manual_scan_crop(str(output_file))
 
 
 async def _is_unoserver_running(host: str, port: int) -> bool: