CVE-2026-43002: Openstack Horizon

Medium severity, CVSS 5.3. EPSS: 0.6% chance of exploitation in the next 30 days.

An issue was discovered in OpenStack Horizon 25.6 and 25.7 before 25.7.3. There is a write operation to the session storage backend before authentication and thus storage can be exhausted by unauthenticated requests. This is a regression of the CVE-2014-8124 fix.

Affected products

• Openstack Horizon: from 25.6.0, before 25.7.3 (fixed in 25.7.3)

Published 2026-05-05. Last modified 2026-09-10.