CVE-2025-64460: Django denial of service in XML serializer text extraction

CVE-2025-64460 · Severity: high · CVSS 7.5 · Published 2025-12-02

Django, a popular web framework for building Python applications, is vulnerable to a denial-of-service attack. An attacker can send a specially crafted XML file to a website using Django's XML processing features, causing the server to consume excessive CPU and memory. This can lead to the website becoming slow or completely unavailable to legitimate users.

Technologies: Djangoproject Django, Django (PyPI). Vendors: Djangoproject, PyPI.

Quick answers

Is CVE-2025-64460 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2025-64460 being exploited in the wild.
How severe is CVE-2025-64460?
High severity, with a CVSS score of 7.5, published 2 December 2025.
Which products and versions are affected?
Django (PyPI) ECOSYSTEM:introduced=4.2,fixed=4.2.27,introduced=5.1,fixed=5.1.15,introduced=5.2,fixed=5.2.9, ECOSYSTEM:introduced=5.2a1,fixed=5.2.9.
Is there a fix for CVE-2025-64460?
Yes. Django (PyPI): upgrade to 5.2.9 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2025-64460 attacked?
It is attacked over the network, in a software library.
Am I affected by CVE-2025-64460?
Check whether you run Djangoproject Django or Django (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • Django (PyPI): upgrade to 5.2.9 or later
    pip install "Django>=5.2.9"

Technical details

A vulnerability exists in the `django.core.serializers.xml_serializer.getInnerText()` function due to inefficient algorithmic complexity (CWE-407). A remote, unauthenticated attacker can exploit this by submitting specially crafted XML input to be processed by the XML `Deserializer`. Successful exploitation triggers CPU and memory exhaustion, leading to a denial-of-service condition. The issue is fixed in Django versions 5.2.9, 5.1.15, and 4.2.27. Unsupported versions such as 5.0.x and 3.2.x may also be affected but were not evaluated.

Affected products

  • Django Software Foundation Django >= 5.2a1, < 5.2.9; >= 5.1a1, < 5.1.15; >= 4.2a1, < 4.2.27

Identifiers

  • CVE-2025-64460
  • GHSA-vrcr-9hj9-jcg6
  • PYSEC-2025-109

Timeline

  • 2025-12-02: disclosed
  • 2025-12-02: patched
  • 2025-12-02: advisory

References

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