Session Storage Vulnerability in OpenStack Horizon by OpenStack
CVE-2026-43002

5.3MEDIUM

Key Information:

Vendor

Openstack
Status
Horizon
Vendor
CVE Published:
5 May 2026

What is CVE-2026-43002?

A vulnerability exists in OpenStack Horizon versions 25.6 and 25.7, allowing unauthenticated write operations to the session storage backend. This flaw can lead to storage exhaustion due to requests that do not require authentication, posing a risk of denial of service. The issue is considered a regression from previous fixes, specifically associated with CVE-2014-8124. It is crucial for users of OpenStack Horizon to update to version 25.7.3 or later to mitigate this risk effectively.

Affected Version(s)

Horizon 25.6.0 < 25.7.3

References

https://bugs.launchpad.net/horizon/+bug/2150331
https://www.openwall.com/lists/oss-security/2026/05/05/7
https://security.openstack.org/ossa/OSSA-2026-009.html

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.