CVE-2011-4137
Denial of service in django
The verify_exists functionality in the URLField implementation in Django before 1.2.7 and 1.3.x before 1.3.1 relies on Python libraries that attempt access to an arbitrary URL with no timeout, which allows remote attackers to cause a denial of service (resource consumption) via a URL associated with (1) a slow response, (2) a completed TCP connection with no application data sent, or (3) a large amount of application data, a related issue to CVE-2011-1521.
Exploit likelihood
What each source reports
NVD Score used
The verify_exists functionality in the URLField implementation in Django before 1.2.7 and 1.3.x before 1.3.1 relies on Python libraries that attempt access to an arbitrary URL with no timeout, which allows remote attackers to cause a denial of service (resource consumption) via a URL associated with (1) a slow response, (2) a completed TCP connection with no application data sent, or (3) a large amount of application data, a related issue to CVE-2011-1521.
- Record
CVE-2011-4137- CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:N/A:P - Weakness
- CWE-399
- Updated
- 2026-11-02
CVE List No score
The verify_exists functionality in the URLField implementation in Django before 1.2.7 and 1.3.x before 1.3.1 relies on Python libraries that attempt access to an arbitrary URL with no timeout, which allows remote attackers to cause a denial of service (resource consumption) via a URL associated with (1) a slow response, (2) a completed TCP connection with no application data sent, or (3) a large amount of application data, a related issue to CVE-2011-1521.
- Record
CVE-2011-4137- Updated
- 2026-11-02
EUVDEUVD-2011-0007 No score
The verify_exists functionality in the URLField implementation in Django before 1.2.7 and 1.3.x before 1.3.1 relies on Python libraries that attempt access to an arbitrary URL with no timeout, which allows remote attackers to cause a denial of service (resource consumption) via a URL associated with (1) a slow response, (2) a completed TCP connection with no application data sent, or (3) a large amount of application data, a related issue to CVE-2011-1521.
- Record
EUVD-2011-0007- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-3jqw-crqj-w8qw
Denial of service in django
The verify_exists functionality in the URLField implementation in Django before 1.2.7 and 1.3.x before 1.3.1 relies on Python libraries that attempt access to an arbitrary URL with no timeout, which allows remote attackers to cause a denial of service (resource consumption) via a URL associated with (1) a slow response, (2) a completed TCP connection with no application data sent, or (3) a large amount of application data, a related issue to CVE-2011-1521.
- Record
GHSA-3jqw-crqj-w8qw- CVSS 4.0
- 8.7 High
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
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-1088
- Updated
- 2026-11-02
OSVGHSA-3jqw-crqj-w8qw
Denial of service in django
The verify_exists functionality in the URLField implementation in Django before 1.2.7 and 1.3.x before 1.3.1 relies on Python libraries that attempt access to an arbitrary URL with no timeout, which allows remote attackers to cause a denial of service (resource consumption) via a URL associated with (1) a slow response, (2) a completed TCP connection with no application data sent, or (3) a large amount of application data, a related issue to CVE-2011-1521.
- Record
GHSA-3jqw-crqj-w8qw- CVSS 4.0
- 8.7 High
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
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-1088
- Updated
- 2026-11-02
OSV No score
The verify_exists functionality in the URLField implementation in Django before 1.2.7 and 1.3.x before 1.3.1 relies on Python libraries that attempt access to an arbitrary URL with no timeout, which allows remote attackers to cause a denial of service (resource consumption) via a URL associated with (1) a slow response, (2) a completed TCP connection with no application data sent, or (3) a large amount of application data, a related issue to CVE-2011-1521.
- Record
CVE-2011-4137- Updated
- 2026-11-02
OSVDEBIAN-CVE-2011-4137 No score
The verify_exists functionality in the URLField implementation in Django before 1.2.7 and 1.3.x before 1.3.1 relies on Python libraries that attempt access to an arbitrary URL with no timeout, which allows remote attackers to cause a denial of service (resource consumption) via a URL associated with (1) a slow response, (2) a completed TCP connection with no application data sent, or (3) a large amount of application data, a related issue to CVE-2011-1521.
- Record
DEBIAN-CVE-2011-4137- Updated
- 2026-11-02
OSVPYSEC-2011-2 No score
The verify_exists functionality in the URLField implementation in Django before 1.2.7 and 1.3.x before 1.3.1 relies on Python libraries that attempt access to an arbitrary URL with no timeout, which allows remote attackers to cause a denial of service (resource consumption) via a URL associated with (1) a slow response, (2) a completed TCP connection with no application data sent, or (3) a large amount of application data, a related issue to CVE-2011-1521.
- Record
PYSEC-2011-2- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
djangoPyPI |
before 1.2.7 | 1.2.7 |
djangoPyPI |
1.3 up to 1.3.1 | 1.3.1 |
python-djangoDebian:12 |
before 1.3.1-1 | 1.3.1-1 |
python-djangoDebian:13 |
before 1.3.1-1 | 1.3.1-1 |
python-djangoDebian:14 |
before 1.3.1-1 | 1.3.1-1 |
python-djangoDebian:6.0 |
before 1.2.3-3+squeeze2, plus listed versions 1.2.3-31.2.3-3+squeeze1 |
1.2.3-3+squeeze2 |
python-djangoDebian:5.0 |
before 1.0.2-1+lenny3, plus listed versions 1.0.2-11.0.2-1+lenny11.0.2-1+lenny2 |
1.0.2-1+lenny3 |
djangoPyPI |
before 1.2.7, plus listed versions 1.0.11.0.21.0.31.0.41.1 Show 11 moreShow less1.1.11.1.21.1.31.1.41.21.2.11.2.21.2.31.2.41.2.51.2.6 |
1.2.7 |
djangoPyPI |
before 1.2.7, 1.3 up to 1.3.1, plus listed versions 1.0.11.0.21.0.31.0.41.1 Show 11 moreShow less1.1.11.1.21.1.31.1.41.21.2.11.2.21.2.31.2.41.2.51.2.6 |
1.2.71.3.1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2011-4137 is a medium vulnerability (CVSS 5.0) in Djangoproject Django, published October 19, 2011. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 3.02%, the 87th percentile. Fixed in django 1.2.7.
References
openwall.com/lists/oss-security/2011/09/15/5
hermes.opensuse.org/messages/14700881
debian.org/security/2011/dsa-2332
bugzilla.redhat.com/show_bug.cgi?id=737366
secunia.com/advisories/46614
Show 10 moreShow less
djangoproject.com/weblog/2011/sep/10/127
nvd.nist.gov/vuln/detail/CVE-2011-4137
github.com/advisories/GHSA-3jqw-crqj-w8qw
security-tracker.debian.org/tracker/CVE-2011-4137