diff --git a/context_test.go b/context_test.go
index 364a92ae..f3751891 100644
--- a/context_test.go
+++ b/context_test.go
@@ -3868,3 +3868,56 @@ func BenchmarkGetMapFromFormData(b *testing.B) {
 		})
 	}
 }
+
+func TestWildcardParamUnicodeConcurrency(t *testing.T) {
+	router := New()
+
+	var mu sync.Mutex
+	var errs []string
+
+	router.GET("/user/:name", func(c *Context) {
+		name := c.Param("name")
+		if name == "" {
+			mu.Lock()
+			errs = append(errs, "name param is empty")
+			mu.Unlock()
+		}
+	})
+
+	router.GET("/files/*filepath", func(c *Context) {
+		filepath := c.Param("filepath")
+		if filepath == "" {
+			mu.Lock()
+			errs = append(errs, "filepath param is empty")
+			mu.Unlock()
+		}
+	})
+
+	var wg sync.WaitGroup
+	paths := []string{
+		"/user/जयेश",
+		"/files/🎉/photo.png",
+		"/user/こんにちは",
+	}
+
+	for i := 0; i < 20; i++ {
+		wg.Add(1)
+		go func() {
+			defer wg.Done()
+			for _, p := range paths {
+				req, _ := http.NewRequest(http.MethodGet, p, nil)
+				w := httptest.NewRecorder()
+				router.ServeHTTP(w, req)
+
+				if w.Code != http.StatusOK {
+					mu.Lock()
+					errs = append(errs, "status code is not 200")
+					mu.Unlock()
+				}
+			}
+		}()
+	}
+	wg.Wait()
+
+	assert.Empty(t, errs)
+}
diff --git a/go.mod b/go.mod
index df181253..c67c5fed 100644
--- a/go.mod
+++ b/go.mod
@@ -12,7 +12,7 @@ require (
 	github.com/mattn/go-isatty v0.0.20
 	github.com/modern-go/reflect2 v1.0.2
 	github.com/pelletier/go-toml/v2 v2.2.4
-	github.com/quic-go/quic-go v0.59.0
+	github.com/quic-go/quic-go v0.59.1
 	github.com/stretchr/testify v1.11.1
 	github.com/ugorji/go/codec v1.3.1
 	go.mongodb.org/mongo-driver/v2 v2.5.0
diff --git a/go.sum b/go.sum
index f7f9e27b..e69bfeee 100644
--- a/go.sum
+++ b/go.sum
@@ -52,8 +52,8 @@ github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZb
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/quic-go/qpack v0.6.0 h1:g7W+BMYynC1LbYLSqRt8PBg5Tgwxn214ZZR34VIOjz8=
 github.com/quic-go/qpack v0.6.0/go.mod h1:lUpLKChi8njB4ty2bFLX2x4gzDqXwUpaO1DP9qMDZII=
-github.com/quic-go/quic-go v0.59.0 h1:OLJkp1Mlm/aS7dpKgTc6cnpynnD2Xg7C1pwL6vy/SAw=
-github.com/quic-go/quic-go v0.59.0/go.mod h1:upnsH4Ju1YkqpLXC305eW3yDZ4NfnNbmQRCMWS58IKU=
+github.com/quic-go/quic-go v0.59.1 h1:0Gmua0HW1Tv7ANR7hUYwRyD0MG5OJfgvYSZasGZzBic=
+github.com/quic-go/quic-go v0.59.1/go.mod h1:upnsH4Ju1YkqpLXC305eW3yDZ4NfnNbmQRCMWS58IKU=
 github.com/rogpeppe/go-internal v1.10.0 h1:TMyTOH3F/DB16zRVcYyreMH6GnZZrwQVAoYjRBZyWFQ=
 github.com/rogpeppe/go-internal v1.10.0/go.mod h1:UQnix2H7Ngw/k4C5ijL5+65zddjncjaFoBhdsK/akog=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
diff --git a/tree.go b/tree.go
index 580abbaf..f12d3b5c 100644
--- a/tree.go
+++ b/tree.go
@@ -509,6 +509,11 @@ walk: // Outer loop for walking the tree
 						// Expand slice within preallocated capacity
 						i := len(*value.params)
 						*value.params = (*value.params)[:i+1]
+
+						// Ensure 'end' index lands exactly on a valid UTF-8 rune boundary
+						for end > 0 && end < len(path) && !utf8.RuneStart(path[end]) {
+							end--
+						}
 						val := path[:end]
 						if unescape {
 							if v, err := url.QueryUnescape(val); err == nil {
diff --git a/tree_test.go b/tree_test.go
index 23339af4..70cc4f4b 100644
--- a/tree_test.go
+++ b/tree_test.go
@@ -1111,3 +1111,20 @@ func TestTreeFindCaseInsensitivePathWildcardParamAndStaticChild(t *testing.T) {
 		t.Errorf("Wrong result for '/prefix/something': %s", string(out))
 	}
 }
+
+func TestTreeWildcardParamImproperBoundaryCoverage(t *testing.T) {
+	tree := &node{}
+
+	// Register a path with a wild named parameter segment
+	tree.addRoute("/submit/:info", HandlersChain{func(c *Context) {}})
+
+	// Pass a path containing a multi-byte sequence where a standard byte segment lookup
+	// drifts directly into the middle of a continuation block.
+	// This exercises our inner boundary alignment decrement loop.
+	path := "/submit/जय"
+	value := tree.getValue(path, &Params{}, nil, false)
+
+	if value.handlers == nil {
+		t.Errorf("Routing fallback failed on multi-byte parameter verification evaluation.")
+	}
+}