CVE-2015-5143: Canonical Ubuntu Linux

High severity, CVSS 7.8. EPSS: 7.3% chance of exploitation in the next 30 days.

The session backends in Django before 1.4.21, 1.5.x through 1.6.x, 1.7.x before 1.7.9, and 1.8.x before 1.8.3 allows remote attackers to cause a denial of service (session store consumption) via multiple requests with unique session keys.

Affected products

• Canonical Ubuntu Linux: version 12.04 only; version 14.04 only; version 15.04 only; version 15.10 only
• Debian Debian Linux: version 7.0 only; version 8.0 only
• Djangoproject Django: version 1.4.20 only; version 1.5 only; version 1.5.1 only; version 1.5.2 only; version 1.5.3 only; version 1.5.4 only; …
• Oracle Solaris: version 11.3 only

Published 2015-07-14. Last modified 2026-06-17.