diff options
| author | Natalia <124304+nessita@users.noreply.github.com> | 2026-01-21 18:03:20 -0300 |
|---|---|---|
| committer | Natalia <124304+nessita@users.noreply.github.com> | 2026-03-03 09:23:20 -0300 |
| commit | 54b50bf7d6dcbf02d4c01f853627cc9299d4934d (patch) | |
| tree | d94ab56f0076866ce9589ae77942bfe965a1c78d /docs | |
| parent | b3e8ec8cc310489fe80174b14b11edb970d682ea (diff) | |
[4.2.x] Fixed CVE-2026-25674 -- Prevented potentially incorrect permissions on file system object creation.
This fix introduces `safe_makedirs()` in the `os` utils as a safer
alternative to `os.makedirs()` that avoids umask-related race conditions
in multi-threaded environments.
This is a workaround for https://github.com/python/cpython/issues/86533
and the solution is based on the fix being proposed for CPython.
Co-authored-by: Gregory P. Smith <68491+gpshead@users.noreply.github.com>
Co-authored-by: Zackery Spytz <zspytz@gmail.com>
Refs CVE-2020-24583 and #31921.
Thanks Tarek Nakkouch for the report, and Jake Howard, Jacob Walls, and
Shai Berger for reviews.
Backport of 019e44f67a8dace67b786e2818938c8691132988 from main.
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/releases/4.2.29.txt | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/docs/releases/4.2.29.txt b/docs/releases/4.2.29.txt index b780264929..71170a5763 100644 --- a/docs/releases/4.2.29.txt +++ b/docs/releases/4.2.29.txt @@ -28,3 +28,18 @@ the previous behavior of ``URLField.to_python()``. This issue has severity "moderate" according to the :ref:`Django security policy <security-disclosure>`. + +CVE-2026-25674: Potential incorrect permissions on newly created file system objects +==================================================================================== + +Django's file-system storage and file-based cache backends used the process +``umask`` to control permissions when creating directories. In multi-threaded +environments, one thread's temporary umask change can affect other threads' +file and directory creation, resulting in file system objects being created +with unintended permissions. + +Django now applies the requested permissions via :func:`~os.chmod` after +:func:`~os.mkdir`, removing the dependency on the process-wide umask. + +This issue has severity "low" according to the :ref:`Django security policy +<security-disclosure>`. |