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Fencer Intel
high 7.5

CVE-2015-5963 json

Django denial of service via empty session record creation

published 2015-08-24 11 y ago modified 2026-06-17 4 mo ago also GHSA-pgxh-wfw4-jx2v , PYSEC-2015-22 , EUVD-2015-0011

cvss
7.5
version 3.1, GitHub
cisa kev
Not listed
not in CISA's catalog
epss
5.2%
EPSS 5.2% chance of exploitation in 30 days, percentile 92%
public exploits
0
none known

Summary

contrib.sessions.middleware.SessionMiddleware in Django 1.8.x before 1.8.4, 1.7.x before 1.7.10, 1.4.x before 1.4.22, and possibly other versions allows remote attackers to cause a denial of service (session store consumption or session record removal) via a large number of requests to contrib.auth.views.logout, which triggers the creation of an empty session record.

Patch / fix

  • pypi django 1.4.22, 1.7.10, 1.8.4
  • python-django Debian 14, Debian 13, Debian 12 1.7.10-1

debian advisories DEBIAN-CVE-2015-5963

  • python-django Ubuntu 14.04 LTS 1.6.1-2ubuntu0.10

ubuntu advisories UBUNTU-CVE-2015-5963

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • python-django openstack 6, openstack 5 1.6.11-3.el7ost
  • python-django-bash-completion openstack 6, openstack 5 1.6.11-3.el7ost
  • python-django openstack 5 1.6.11-3.el6ost
  • python-django-bash-completion openstack 5 1.6.11-3.el6ost
  • python-django openstack 7 1.8.4-1.el7
  • python-django-bash-completion openstack 7 1.8.4-1.el7

red hat advisories RHSA-2015:1894RHSA-2015:1766RHSA-2015:1767RHSA-2015:1876

  • python-Django Enterprise Storage 2 1.6.11-3.1
  • python-Django OpenStack Cloud 5 1.6.11-10.2
  • python-Django Enterprise Storage 1.0 1.6.11-8.1

suse advisories SUSE-SU-2016:0044-1SUSE-SU-2015:1810-1SUSE-SU-2015:1815-1

  • python-Django5 openSUSE Tumbleweed 5.2.16-1.1
  • python-Django openSUSE Tumbleweed 5.2.16-1.1
  • python-Django4 openSUSE Tumbleweed 4.2.30-4.1
  • python-Django6 openSUSE Tumbleweed 6.0-1.1
  • python-Django4 openSUSE Tumbleweed 4.2.14-1.1
  • python-Django openSUSE Tumbleweed 1.9.12-1.1
  • python-Django openSUSE Tumbleweed 3.2.7-2.3
  • python-Django openSUSE Tumbleweed 4.2.11-2.1

opensuse advisories openSUSE-SU-2026:11270-1openSUSE-SU-2026:11248-1openSUSE-SU-2026:11235-1openSUSE-SU-2026:10005-1openSUSE-SU-2024:14208-1openSUSE-SU-2024:10066-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2015-5963 updated cvss 5.0

python-django: Denial-of-service possibility in logout() view by filling session store

  • Red Hat Enterprise Linux OpenStack Platform 5.0 (Icehouse) for RHEL 6 python-django 1.6.11-3.el6ost, python-django-bash-completion 1.6.11-3.el6ost
    fixed: vendor fix RHSA-2015:1766
  • Red Hat Enterprise Linux OpenStack Platform 5.0 (Icehouse) for RHEL 7 python-django 1.6.11-3.el7ost, python-django-bash-completion 1.6.11-3.el7ost
    fixed: vendor fix RHSA-2015:1767
  • Red Hat Enterprise Linux OpenStack Platform 6.0 (Juno) for RHEL 7 python-django 1.6.11-3.el7ost, python-django-bash-completion 1.6.11-3.el7ost
    fixed: vendor fix RHSA-2015:1894
  • Red Hat Enterprise Linux OpenStack Platform 7.0 (Kilo) for RHEL 7 python-django 1.8.4-1.el7, python-django-bash-completion 1.8.4-1.el7
    fixed: vendor fix RHSA-2015:1876

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

5.21% chance of exploitation in the next 30 days, higher than 92% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
pypi django
>=1.8, <1.8.4
>=1.7, <1.7.10
>=1.4, <1.4.22
1.8.4
1.7.10
1.4.22

Classification

Weakness
  • CWE-399 Resource Management Errors
  • CWE-770 Allocation of Resources Without Limits or Throttling
Technology feeds

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.