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    CVE-2009-3695

    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.

    Published:Oct 13, 2009
    Last Modified:Apr 23, 2026
    EPS:Oct 13, 2009
    EPSS Score:0.06201
    CVSS Score:5

    Affected Products

    Vendor
    Djangoproject
    Product
    Django

    Exploits

    No exploit reference

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-15920 (CVSS 5.1) — An issue was discovered in Django 5.2 before 5.2.17 and 6.0 before 6.0.8. `django.contrib.admin.utils.display_…
    CVE-2026-15830 (CVSS 6.9) — An issue was discovered in Django 5.2 before 5.2.17 and 6.0 before 6.0.8. GeoDjango's `django.contrib.gis.geos…
    CVE-2026-15337 (CVSS 6.9) — An issue was discovered in Django 5.2 before 5.2.17 and 6.0 before 6.0.8. `django.utils.translation.check_for_…
    CVE-2026-15307 (CVSS 8.7) — An issue was discovered in Django 5.2 before 5.2.17 and 6.0 before 6.0.8. GeoDjango spatial lookups optimistic…
    CVE-2026-53877 (CVSS 6.3) — An issue was discovered in Django 6.0 before 6.0.7 and 5.2 before 5.2.16. `django.contrib.gis.gdal.GDALRaster`…
    CVE-2026-53878 (CVSS 5.3) — An issue was discovered in Django 6.0 before 6.0.7 and 5.2 before 5.2.16. `DomainNameValidator` does not prohi…
    CVE-2026-48588 (CVSS 2.3) — An issue was discovered in Django 6.0 before 6.0.7 and 5.2 before 5.2.16. `UpdateCacheMiddleware` and the `cac…
    CVE-2026-48587 (CVSS 2.3) — An issue was discovered in Django 5.2 before 5.2.15 and 6.0 before 6.0.6. `django.utils.cache.has_vary_header(…
    CVE-2026-35193 (CVSS 2.3) — An issue was discovered in Django 5.2 before 5.2.15 and 6.0 before 6.0.6. `django.middleware.cache.UpdateCache…
    CVE-2026-8404 (CVSS 2.3) — An issue was discovered in Django 5.2 before 5.2.15 and 6.0 before 6.0.6. `django.middleware.cache.UpdateCache…

    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/
    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

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High