An issue was discovered in 5.2 before 5.2.9, 5.1 before 5.1.15, and 4.2 before 4.2.27. Algorithmic complexity in `django.core.serializers.xml_serializer.getInnerText()` allows a remote attacker to cause a potential denial-of-service attack triggering CPU and memory exhaustion via specially crafted XML input processed by the XML `Deserializer`. Earlier, unsupported Django series (such as 5.0.x, 4.1.x, and 3.2.x) were not evaluated and may also be affected. Django would like to thank Seokchan Yoon for reporting this issue.
Fix
Patch, vendor advisory and mitigation references on NVD 2
- https://docs.djangoproject.com/en/dev/releases/security/ Patch, Vendor Advisory
- https://www.djangoproject.com/weblog/2025/dec/02/security-releases/ Patch, Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 7.5 · djangoprojectNVD modified 2026-10-18 18:10
Affected (CPE criteria) 1
cpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*
References 3
- https://docs.djangoproject.com/en/dev/releases/security/ Patch, Vendor Advisory
- https://groups.google.com/g/django-announce Mailing List, Release Notes
- https://www.djangoproject.com/weblog/2025/dec/02/security-releases/ Patch, Vendor Advisory