@@ -102,6 +102,7 @@ def __new__(
 
         instance = super().__new__(cls, __message, __exceptions)
         instance._exceptions = tuple(__exceptions)
+        instance._exceptions_str = repr(list(__exceptions))
         return instance
 
     def __init__(
@@ -275,7 +276,7 @@ def __str__(self) -> str:
         return f"{self.message} ({len(self._exceptions)} sub-exception{suffix})"
 
     def __repr__(self) -> str:
-        return f"{self.__class__.__name__}({self.args[0]!r}, {self.args[1]!r})"
+        return f"{self.__class__.__name__}({self.args[0]!r}, {self._exceptions_str})"
 
 
 class ExceptionGroup(BaseExceptionGroup[_ExceptionT_co], Exception):
 
@@ -882,7 +882,20 @@ def test_exceptions_mutate_original_sequence():
 
     exceptions.append(KeyError("bar"))
     assert excgrp.exceptions is exc_tuple
-    assert repr(excgrp) == (
-        "BaseExceptionGroup('foo', [ValueError(1), KeyboardInterrupt(), "
-        "KeyError('bar')])"
-    )
+    if sys.version_info < (3, 11):
+        # Backport: repr should reflect the original exceptions, not the
+        # mutated list (matches CPython fix: cpython#141736)
+        assert repr(excgrp) == (
+            "BaseExceptionGroup('foo', [ValueError(1), KeyboardInterrupt()])"
+        )
+    elif sys.version_info >= (3, 13, 12) or sys.version_info >= (3, 14):
+        # CPython 3.13.12+ and 3.14+ include the fix
+        assert repr(excgrp) == (
+            "BaseExceptionGroup('foo', [ValueError(1), KeyboardInterrupt()])"
+        )
+    else:
+        # CPython 3.11-3.13.11 still have the old behavior
+        assert repr(excgrp) == (
+            "BaseExceptionGroup('foo', [ValueError(1), KeyboardInterrupt(), "
+            "KeyError('bar')])"
+        )