fix(canvas): reject malformed document paths

CHANGELOG.md

@@ -13,7 +13,7 @@ Docs: https://docs.openclaw.ai
 
 - CLI tables: preserve muted/color styling on wrapped continuation lines after multiline cells, keeping `openclaw plugins list` descriptions readable.
 - iOS: restore first-use Contacts, Calendar, and Reminders permission prompts and add Privacy & Access status/actions in Settings. Thanks @BunsDev.
-- Canvas: return not found for malformed percent-encoded Canvas/A2UI asset paths and keep decoded parent traversal blocked before path normalization.
+- Canvas: return not found for malformed percent-encoded Canvas/A2UI/document asset paths and keep decoded parent traversal blocked before path normalization.
 - Agents: allow dot-dot-prefixed filenames such as `..note.txt` through sandbox FS bridge, remote sandbox reads, and apply_patch summaries without mistaking the name for parent traversal.
 - CLI/migrate: humanize Codex conflict-status messaging across the migrate UI so selection prompts and plan/result rows say "Codex skill already installed in workspace" instead of surfacing internal `MIGRATION_REASON_*` codes. Thanks @sjf.
 - CLI/migrate: render migrate result rows with distinct glyphs for manual-review (🔍) and archive (📖) items instead of the misleading "skipped" and "migrated" checkmarks, so users can see which entries still need attention versus which were filed away. Thanks @sjf.

extensions/canvas/src/documents.test.ts

@@ -239,4 +239,26 @@ describe("canvas documents", () => {
       ),
     ).toBeNull();
   });
+
+  it("rejects malformed encoded hosted canvas document paths", async () => {
+    const stateDir = await mkdtemp(path.join(tmpdir(), "openclaw-canvas-documents-"));
+    tempDirs.push(stateDir);
+    const documentId = "cv_malformed";
+    const documentDir = resolveCanvasDocumentDir(documentId, { stateDir });
+    await mkdir(documentDir, { recursive: true });
+    await writeFile(path.join(documentDir, "%E0%A4%A.html"), "literal-percent-name", "utf8");
+
+    expect(
+      resolveCanvasHttpPathToLocalPath(
+        `/__openclaw__/canvas/documents/${documentId}/%E0%A4%A.html`,
+        { stateDir },
+      ),
+    ).toBeNull();
+    expect(
+      resolveCanvasHttpPathToLocalPath(
+        `/__openclaw__/canvas/documents/${documentId}/%25E0%25A4%25A.html`,
+        { stateDir },
+      ),
+    ).toBe(path.join(documentDir, "%E0%A4%A.html"));
+  });
 });

extensions/canvas/src/documents.ts

@@ -153,16 +153,17 @@ export function resolveCanvasHttpPathToLocalPath(
   }
   const pathWithoutQuery = trimmed.replace(/[?#].*$/, "");
   const relative = pathWithoutQuery.slice(prefix.length);
-  const segments = relative
-    .split("/")
-    .map((segment) => {
-      try {
-        return decodeURIComponent(segment);
-      } catch {
-        return segment;
-      }
-    })
-    .filter(Boolean);
+  const segments: string[] = [];
+  for (const segment of relative.split("/")) {
+    if (!segment) {
+      continue;
+    }
+    try {
+      segments.push(decodeURIComponent(segment));
+    } catch {
+      return null;
+    }
+  }
   if (segments.length < 2) {
     return null;
   }