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CVE-2009-3695

20
FAUCET Score

CVE-2009-3695 is an algorithmic complexity vulnerability affecting Django versions 1.0 before 1.0.4 and 1.1 before 1.1.1. It allows remote attackers to cause a denial of service by submitting specially crafted email addresses or URLs that trigger excessive regular expression backtracking, leading to high CPU consumption. This vulnerability has a CVSS score of 5.0, indicating a medium severity, with a network attack vector, low attack complexity, and potential for partial denial of service. While there is no known active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered significant community discussion with 10 mentions, suggesting awareness among security professionals.

Impacted Technologies

VendorProductVersion(s)CPE
1.0CPE matchmatch criteria
cpe:2.3:a:djangoproject:django:1.0:*:*:*:*:*:*:*
1.1CPE matchmatch criteria
cpe:2.3:a:djangoproject:django:1.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

AV:N/AC:L/Au:N/C:N/I:N/A:P

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
3.69%
Probability of exploitation in next 30 days
EPSS Percentile
88.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0369 is in the 85th percentile among its peer group of 23,725 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

pippatch availablevia ghsa
Product: DjangoFixed in: 1.0.4
pippatch availablevia ghsa
Product: DjangoFixed in: 1.1.1

Vendor Advisories (2)

pipGHSA-p6m5-h7pp-v2x5high

Django Regex Algorithmic Complexity Causes Denial of Service

May 2, 2022
redhatCVE-2009-3695

Django's forms DOS in 1.1/1.0

References

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