CVE-2011-4137

mediumpriority · track · 21EPSS 0.030 · 87 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

3.02% (87th) EPSS

CVSS 5 · medium

Is it mine?

22 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · osv · nvd

EPSS · scored 2026-10-27

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.

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 4.3–7.5

v2.05mediumAV:N/AC:L/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 10 · impact 2.9

v2.04.3mediumAV:N/AC:L/Au:N/C:N/I:N/A:P/E:Usecondary · CVSS-BT (t0sche)

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · OSV

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-399USprimaryCWE-1088US

affected products (22)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
djangoproject django≤ 1.2.6nvdUScpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*
djangoproject django= 0.91nvdUScpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*
djangoproject django= 0.95nvdUScpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*
djangoproject django= 0.95.1nvdUScpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*
djangoproject django= 0.96nvdUScpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*
djangoproject django= 1.0nvdUScpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*
djangoproject django= 1.0.1nvdUScpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*
djangoproject django= 1.0.2nvdUScpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*
djangoproject django= 1.1nvdUScpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*
djangoproject django= 1.1.0nvdUScpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*
djangoproject django= 1.1.2nvdUScpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*
djangoproject django= 1.1.3nvdUScpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*
djangoproject django= 1.2nvdUScpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*
djangoproject django= 1.2.1nvdUScpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*
djangoproject django= 1.2.2nvdUScpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*
djangoproject django= 1.2.3nvdUScpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*
djangoproject django= 1.2.4nvdUScpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*
djangoproject django= 1.2.5nvdUScpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*
djangoproject django= 1.3nvdUScpe:2.3:a:djangoproject:django:*:*:*:*:*:*:*:*

showing 20 of 22

advisories (2)

Vendor and ecosystem advisories describing this.

GHSA-3jqw-crqj-w8qwDenial of service in django2018-07-23ghsa · osvUS
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.
PYSEC-2011-22011-10-19vendor · osvUS
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.

also known as (6)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd osv nvd NVD CVE.org MITRE

published 2011-10-19modified 2026-06-16

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+3721 more

references (24)

External citations — patches, advisories, analysis.

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