diff --git a/src/utils/repo-path.ts b/src/utils/repo-path.ts
index 8f6da3605..e47bfc7a4 100644
--- a/src/utils/repo-path.ts
+++ b/src/utils/repo-path.ts
@@ -11,16 +11,16 @@ export function isValidRepoPath(path: string) {
     return false
   }
 
-  if (
-    path.startsWith('/') ||
-    path.endsWith('/') ||
-    path.includes('//') ||
-    path.includes('..')
-  ) {
+  if (path.startsWith('/') || path.endsWith('/') || path.includes('//')) {
     return false
   }
 
   return path.split('/').every((segment) => {
+    // Reject only actual relative path segments, not names like `[...404].tsx`
+    if (segment === '.' || segment === '..') {
+      return false
+    }
+
     return REPO_PATH_SEGMENT_PATTERN.test(segment)
   })
 }
diff --git a/tests/repo-path.test.ts b/tests/repo-path.test.ts
index 762a500ef..8bf26f8b1 100644
--- a/tests/repo-path.test.ts
+++ b/tests/repo-path.test.ts
@@ -36,6 +36,38 @@ assert.equal(
   'traversal is rejected',
 )
 
+assert.equal(
+  isValidRepoPath(
+    'examples/solid/solid-start-streaming/src/routes/[...404].tsx',
+  ),
+  true,
+  'catch-all route files with spread notation are valid repo path segments',
+)
+
+assert.equal(
+  isValidRepoPath('examples/svelte/basic/src/routes/[...slug]/+page.svelte'),
+  true,
+  'catch-all route directories with spread notation are valid repo path segments',
+)
+
+assert.equal(
+  isValidRepoPath('src/../routes/__root.tsx'),
+  false,
+  'nested traversal is rejected',
+)
+
+assert.equal(
+  isValidRepoPath('src/routes/..'),
+  false,
+  'trailing traversal is rejected',
+)
+
+assert.equal(
+  isValidRepoPath('src/./routes/__root.tsx'),
+  false,
+  'current-directory segments are rejected',
+)
+
 assert.equal(
   isValidRepoPath('src/routes//__root.tsx'),
   false,