CVE-2009-3695

Severity: medium (CVSS 5.0 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 3.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2009-10-13 · updated 2026-06-16

Description

Algorithmic complexity vulnerability in the forms library in Django 1.0 before 1.0.4 and 1.1 before 1.1.1 allows remote attackers to cause a denial of service (CPU consumption) via a crafted (1) EmailField (email address) or (2) URLField (URL) that triggers a large amount of backtracking in a regular expression.

Affected products

Django: 1.0, 1.1

References

http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=550457
http://groups.google.com/group/django-users/browse_thread/thread/15df9e45118dfc51/
http://secunia.com/advisories/36948
http://secunia.com/advisories/36968
http://www.debian.org/security/2009/dsa-1905
http://www.djangoproject.com/weblog/2009/oct/09/security/
http://www.openwall.com/lists/oss-security/2009/10/13/6
http://www.securityfocus.com/bid/36655
http://www.vupen.com/english/advisories/2009/2871
https://exchange.xforce.ibmcloud.com/vulnerabilities/53727
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=550457
http://groups.google.com/group/django-users/browse_thread/thread/15df9e45118dfc51/

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