CVE-2026-43002

EUVD-2026-27406
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
mitreCNA
5.3 MEDIUM
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Base Score
CVSS 3.x
EPSS Score
Percentile: 18%
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
openstackhorizon
25.6.0 ≤
𝑥
< 25.7.3
CNA
Debian logo
Debian Releases
Debian Product
Codename
horizon
bookworm
3:23.0.0-5+deb12u1
fixed
bullseye
3:18.6.2-5+deb11u2
fixed
forky
vulnerable
sid
3:25.7.3-1
fixed
trixie
3:25.3.0-3
fixed
Common Weakness Enumeration
References
https://bugs.launchpad.net/horizon/+bug/2150331
https://security.openstack.org/ossa/OSSA-2026-009.html
https://www.openwall.com/lists/oss-security/2026/05/05/7
https://bugs.launchpad.net/horizon/+bug/2150331