diff --git a/packages/local-config-updater/src/index.ts b/packages/local-config-updater/src/index.ts
index c702ab24e..3cc9842d5 100644
--- a/packages/local-config-updater/src/index.ts
+++ b/packages/local-config-updater/src/index.ts
@@ -201,7 +201,9 @@ function snapshotConfigFiles(configFilePath: string, configContent: string): Con
   const dir = path.dirname(configFilePath);
   const snapshots: ConfigFileSnapshot[] = [{ path: path.resolve(configFilePath), content: configContent }];
   for (const specifier of getRelativeImportSpecifiers(configContent)) {
-    captureSnapshotIfAbsent(snapshots, path.resolve(dir, specifier));
+    const resolved = path.resolve(dir, specifier);
+    if (!isPathInsideDir(dir, resolved)) continue;
+    captureSnapshotIfAbsent(snapshots, resolved);
   }
   return snapshots;
 }