.. changelog::
    :version: 1.4.3
    :released: Tue Sep 22 2026

    .. change::
        :tags: bug, tests
        :tickets: 441

        Fixed regression caused in 1.4.2 where tests added to the suite were
        unable to run directly on Windows, due to posix mechanics: the tests
        force
        ``os.path`` to ``posixpath``, whereas
        :meth:`.TemplateLookup.get_template` converts the configured directory
        using ``os.path.sep``.  These tests are now skipped on that platform,
        where the traversal check is instead exercised against ``ntpath``
        natively.

.. changelog::
    :version: 1.4.2
    :released: Tue Sep 22 2026

    .. change::
        :tags: bug, tests
        :tickets: 440

        Adjusted the test suite to accommodate for a change in Pygments 2.21.0
        where the ``HtmlFormatter`` now renders ``"`` and ``'`` characters
        literally rather than as HTML entities, which caused failures in tests
        that assert against the rendered output of
        :func:`.html_error_template`.

    .. change::
        :tags: bug, template
        :tickets: 441

        Fixed issue in :class:`.TemplateLookup` where a URI beginning with a
        drive
        designator (e.g. ``C:/../../secret.txt``) could bypass the directory
        traversal check on Windows, allowing reads of arbitrary files outside of
        the template directory.  The check in :class:`.Template` normalized the
        URI
        using ``os.path``, which on Windows is ``ntpath``; as ``ntpath`` splits
        the
        drive designator off and treats the remainder as rooted, the ``..``
        segments were absorbed before the check could inspect them.
        Normalization
        is now performed with ``posixpath``, which is the same module used by
        :meth:`.TemplateLookup.get_template` to resolve the URI to a file.