CVE-2026-43002

MEDIUM
5.3
CVSS Score
Published: May 5, 2026 at 12:00 AM UTC
Updated: September 10, 2026 at 09:38 PM UTC
1 product affected across 1 vendorHorizon

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Severity
MEDIUM5.3
Exploit prediction
EPSS 0.4%
SSVC
PoC

Description

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

25.6.0 ≤ v < 25.7.325.6.0
Affected range stops below 25.7.3, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (3)

ExploitIssue TrackingVendor Advisory
Source: cverecord
https://bugs.launchpad.net/horizon/+bug/2150331
Mailing ListPatchThird Party Advisory
Source: cverecord
https://www.openwall.com/lists/oss-security/2026/05/05/7
PatchVendor Advisory
Source: cverecord
https://security.openstack.org/ossa/OSSA-2026-009.html

SSVC — Action Prioritization

SSVCPoCAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.3MEDIUMmitre
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
LOW
Vector?

Quick Info

StatusANALYZED
CWE
CWE-696

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