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
NISTPrimary
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: 29.8%
Affected Products (NVD)
VendorProductVersion
openstackhorizon
25.6.0 ≤
𝑥
< 25.7.3
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
horizon
bookworm
3:23.0.0-5+deb12u2
fixed
bullseye
not-affected
forky
3:25.7.3-2
fixed
sid
3:25.7.3-2
fixed
trixie
3:25.3.0-3+deb13u1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
horizon
bionic
needs-triage
focal
needs-triage
jammy
needs-triage
noble
needs-triage
questing
ignored
resolute
needs-triage
xenial
needs-triage
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