========================================================================== Ubuntu Security Notice USN-8154-2 April 09, 2026
python-django vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS
Summary:
Several security issues were fixed in Django.
Software Description:
- python-django: High-level Python web development framework
Details:
USN-8154-1 fixed vulnerabilities in Django. This update provides the
corresponding updates for CVE-2026-33033 and CVE-2026-4292 in Ubuntu 14.04
LTS and Ubuntu 16.04 LTS, and CVE-2026-4277 in Ubuntu 16.04 LTS.
Original advisory details:
Seokchan Yoon discovered that Django incorrectly handled copying memory
when parsing multipart uploads with excessive whitespace. A remote
attacker could possibly use this issue to cause Django to use excessive
resources, leading to a denial of service. (CVE-2026-33033)
It was discovered that Django did not enforce an upload memory size limit
in the Content-Length header. A remote attacker could possibly use this
issue to cause Django to use excessive resources, leading to a denial of
service. This issue only affected Ubuntu 24.04 LTS and Ubuntu 25.10.
(CVE-2026-33034)
Tarek Nakkouch discovered that Django incorrectly handled underscores in
the ASGI headers. A remote attacker could possibly use this issue to spoof
HTTP headers. This issue only affected Ubuntu 22.04 LTS, Ubuntu 24.04 LTS,
and Ubuntu 25.10. (CVE-2026-3902)
It was discovered that Django incorrectly handled verification of model
data created with POST requests. A remote attacker could possibly use this
issue to forge new model permissions. (CVE-2026-4277, CVE-2026-4292)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 16.04 LTS
python-django 1.8.7-1ubuntu5.15+esm12
Available with Ubuntu Pro
python3-django 1.8.7-1ubuntu5.15+esm12
Available with Ubuntu Pro
Ubuntu 14.04 LTS
python-django 1.6.11-0ubuntu1.3+esm11
Available with Ubuntu Pro
In general, a standard system update will make all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-8154-2
https://ubuntu.com/security/notices/USN-8154-1
CVE-2026-33033, CVE-2026-4277, CVE-2026-4292
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