{"id":"CVE-2009-3695","aliases":["GHSA-p6m5-h7pp-v2x5","PYSEC-2009-4"],"url":"https://o3.security/vulnerability/CVE-2009-3695","summary":"Django Regex Algorithmic Complexity Causes Denial of Service","details":"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":"2009-10-13T10:30:00Z","modified":"2026-04-10T03:40:57.502941Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"django","fixedVersion":"1.0.4"},{"ecosystem":"PyPI","name":"django","fixedVersion":"1.1.1"}],"fix":null,"references":[{"type":"ADVISORY","url":"http://secunia.com/advisories/36948"},{"type":"ADVISORY","url":"http://secunia.com/advisories/36968"},{"type":"ADVISORY","url":"http://www.debian.org/security/2009/dsa-1905"},{"type":"ADVISORY","url":"http://www.djangoproject.com/weblog/2009/oct/09/security/"},{"type":"ADVISORY","url":"http://www.vupen.com/english/advisories/2009/2871"},{"type":"FIX","url":"http://www.djangoproject.com/weblog/2009/oct/09/security/"},{"type":"FIX","url":"http://www.securityfocus.com/bid/36655"},{"type":"FIX","url":"http://www.vupen.com/english/advisories/2009/2871"},{"type":"WEB","url":"http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=550457"},{"type":"WEB","url":"http://groups.google.com/group/django-users/browse_thread/thread/15df9e45118dfc51/"},{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2009/10/13/6"},{"type":"WEB","url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/53727"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-04-10T03:40:57.502941Z"}}