Django's forms DOS in 1.1/1.0
Published Oct 13, 2009
8.7
HIGHCVSS 4.0
EPSS 3.72%
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
No data.
- 1.0
- 1.1
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (9 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 3.72% (0.03717) | 89.45th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.69% (0.03686) | 88.23th | v5 (v2026.06.15) |
| Jul 23, 2025 | 6.20% (0.06201) | 90.43th | v4 (v2025.03.14) |
| Mar 17, 2025 | 1.10% (0.01098) | 76.47th | v4 (v2025.03.14) |
| Feb 9, 2025 | 7.26% (0.07263) | 94.05th | v3 (v2023.03.01) |
| Mar 7, 2023 | 6.08% (0.06084) | 92.35th | v3 (v2023.03.01) |
| Mar 6, 2023 | 2.17% (0.02172) | 80.77th | v2 (v2022.01.01) |
| Apr 1, 2022 | 2.17% (0.02172) | 78.91th | v2 (v2022.01.01) |
| Feb 4, 2022 | 2.17% (0.02172) | 57.73th | v2 (v2022.01.01) |
References (21)
- http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=550457 x_refsource_CONFIRM
- http://groups.google.com/group/django-users/browse_thread/thread/15df9e45118dfc51 x_refsource_MISC
- http://secunia.com/advisories/36948 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://secunia.com/advisories/36968 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://www.debian.org/security/2009/dsa-1905 vendor-advisoryx_refsource_DEBIAN
- http://www.djangoproject.com/weblog/2009/oct/09/security x_refsource_CONFIRMPatchVendor Advisory
- http://www.openwall.com/lists/oss-security/2009/10/13/6 mailing-listx_refsource_MLIST
- http://www.securityfocus.com/bid/36655 vdb-entryx_refsource_BIDPatch
- http://www.vupen.com/english/advisories/2009/2871 vdb-entryx_refsource_VUPENPatchVendor Advisory
- https://access.redhat.com/security/cve/CVE-2009-3695 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=528246 Issue Tracking
- https://exchange.xforce.ibmcloud.com/vulnerabilities/53727 vdb-entryx_refsource_XF
- https://github.com/advisories/GHSA-p6m5-h7pp-v2x5 Advisory
- https://github.com/django/django/commit/594a28a9044120bed58671dde8a805c9e0f6c79a
- https://github.com/django/django/commit/e3e992e18b368fcd56aabafc1b5bf80a6e11b495
- https://github.com/pypa/advisory-database/tree/main/vulns/django/PYSEC-2009-4.yaml
- https://nvd.nist.gov/vuln/detail/CVE-2009-3695
- https://web.archive.org/web/20091013093057/http://secunia.com/advisories/36968
- https://web.archive.org/web/20091017070244/http://secunia.com/advisories/36948
- https://web.archive.org/web/20200228171918/http://www.securityfocus.com/bid/36655
- https://www.cve.org/CVERecord?id=CVE-2009-3695
Change history (0)
No recorded changes yet.