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An issue was discovered in OpenStack Horizon 25.6 and 25.7 before 25.7.3. (CVE-2026-43002)

0
Medium
VulnerabilityCVE-2026-43002gcveosvubuntu-cve-2026-43002cve-2026-43002ubuntu-16-04-ltsubuntu-18-04-ltsubuntu-pro-20-04-ltsubuntu-22-04-ltsubuntu-24-04-ltsubuntu-25-10ubuntu-26-10ubuntu-26-04-lts
Published: 05/05/2026 (05/05/2026, 17:17:00 UTC)
Source: GCVE Database
Product: horizon

Description

OpenStack Horizon versions 25.6 and 25.7 prior to 25.7.3 contain a vulnerability where unauthenticated requests can perform write operations to the session storage backend, potentially exhausting storage resources. This issue is a regression of a previous fix (CVE-2014-8124). The vulnerability has a medium severity with a CVSS score of 5.3 and does not impact confidentiality or integrity but can affect availability.

CVSS v3.1

Score 5.3medium

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Affected software

Ubuntu:16.04:LTSmore threats →ghsa
horizon
pkg:deb/ubuntu/horizon?arch=source&distro=xenial
Affected versions
=2:8.0.0-0ubuntu2=2:9.0.0~b1-0ubuntu1=2:9.0.0~b1-0ubuntu2=2:9.0.0~b2-0ubuntu1=2:9.0.0~b3-0ubuntu1=2:9.0.0~rc1-0ubuntu1=2:9.0.0-0ubuntu1=2:9.0.0-0ubuntu2=2:9.0.0-0ubuntu2.16.04.1=2:9.0.1-0ubuntu2=2:9.1.0-0ubuntu1=2:9.1.1-0ubuntu1=2:9.1.2-0ubuntu1=2:9.1.2-0ubuntu2=2:9.1.2-0ubuntu3=2:9.1.2-0ubuntu5=2:9.1.2-0ubuntu5.2
Ubuntu:18.04:LTSmore threats →ghsa
horizon
pkg:deb/ubuntu/horizon?arch=source&distro=bionic
Affected versions
=3:12.0.0-0ubuntu2.1=3:12.0.0-0ubuntu3=3:13.0.0~b1-0ubuntu1=3:13.0.0~b1-0ubuntu2=3:13.0.0-0ubuntu1=3:13.0.0-0ubuntu1.1=3:13.0.1-0ubuntu1=3:13.0.1-0ubuntu2=3:13.0.1-0ubuntu3=3:13.0.1-0ubuntu4=3:13.0.1-0ubuntu5=3:13.0.1-0ubuntu6=3:13.0.2-0ubuntu1=3:13.0.2-0ubuntu2=3:13.0.2-0ubuntu3=3:13.0.3-0ubuntu1=3:13.0.3-0ubuntu2
Ubuntu:Pro:20.04:LTSmore threats →ghsa
horizon
pkg:deb/ubuntu/horizon?arch=source&distro=esm-infra/focal
Affected versions
=3:16.0.0-0ubuntu1=3:17.0.0~b1~git2019121712.f7313b74c-0ubuntu1=3:18.0.1~git2020021409.bb959361b-0ubuntu2=3:18.0.1~git2020021409.bb959361b-0ubuntu3=3:18.2.1~git2020032709.2c4470272-0ubuntu1=3:18.2.1~git2020041013.754804667-0ubuntu1=3:18.2.1~git2020041013.754804667-0ubuntu2=3:18.2.1~git2020041013.754804667-0ubuntu3=3:18.3.2-0ubuntu0.20.04.1=3:18.3.2-0ubuntu0.20.04.2=3:18.3.2-0ubuntu0.20.04.4=3:18.3.3-0ubuntu1=3:18.3.4-0ubuntu1=3:18.3.5-0ubuntu1=3:18.3.5-0ubuntu2=3:18.3.5-0ubuntu2.1=3:18.3.5-0ubuntu2.2=3:18.3.5-0ubuntu2.3=3:18.3.5-0ubuntu2.3+esm1
Ubuntu:22.04:LTSmore threats →ghsa
horizon
pkg:deb/ubuntu/horizon?arch=source&distro=jammy
Affected versions
=4:20.1.0-0ubuntu1=4:20.2.0+git2021120911.fc1012628-0ubuntu1=4:20.2.0+git2022011216.8fe5bbc8d-0ubuntu1=4:21.0.0+git2022030313.dd9e4c82b-0ubuntu2=4:22.1.0-0ubuntu1=4:22.1.0-0ubuntu2=4:22.1.0-0ubuntu2.1=4:22.1.1-0ubuntu1=4:22.1.1-0ubuntu1.1
Ubuntu:24.04:LTSmore threats →ghsa
horizon
pkg:deb/ubuntu/horizon?arch=source&distro=noble
Affected versions
=4:23.3.0-0ubuntu1=4:23.3.0-0ubuntu2=4:23.4.0+git2024011916.a77818d7-0ubuntu1=4:24.0.0-0ubuntu1=4:24.0.0-0ubuntu1.1=4:24.0.0-0ubuntu1.2=4:24.0.0-0ubuntu1.3=4:24.0.1-0ubuntu0.24.04.1=4:24.0.1-0ubuntu0.24.04.2
Ubuntu:25.10more threats →ghsa
horizon
pkg:deb/ubuntu/horizon?arch=source&distro=questing
Affected versions
=4:25.3.0-0ubuntu1=4:25.4.0+git2025070714.33cbc0c53-0ubuntu2=4:25.5.1-0ubuntu1=4:25.5.1-0ubuntu1.1
Ubuntu:26.10more threats →ghsa
horizon
pkg:deb/ubuntu/horizon?arch=source&distro=stonking
Affected versions
=4:25.7.1-0ubuntu1=4:26.0.0-0ubuntu1=4:27.0.0-0ubuntu1
Ubuntu:26.04:LTSmore threats →ghsa
horizon
pkg:deb/ubuntu/horizon?arch=source&distro=resolute
Affected versions
=4:25.5.1-0ubuntu1=4:25.5.1-0ubuntu2=4:25.5.1+git2026012819.479212220-0ubuntu1=4:25.7.1-0ubuntu1

Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.

AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 10/18/2026, 01:38:06 UTC

Technical Analysis

CVE-2026-43002 affects OpenStack Horizon versions 25.6 and 25.7 before 25.7.3. The vulnerability arises from a write operation to the session storage backend occurring before user authentication, allowing unauthenticated requests to exhaust storage resources. This is a regression of a prior fix for CVE-2014-8124. The issue impacts availability but does not compromise confidentiality or integrity.

Potential Impact

The vulnerability allows unauthenticated users to perform write operations to the session storage backend, which can lead to exhaustion of storage resources and thus impact the availability of the OpenStack Horizon service. There is no impact on confidentiality or integrity.

Mitigation Recommendations

A fix is available in OpenStack Horizon version 25.7.3 and later. Users should upgrade to version 25.7.3 or newer to remediate this vulnerability.

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Technical Details

Gcve Source
db.gcve.eu
Osv Id
UBUNTU-CVE-2026-43002
Osv Schema Version
1.7.0
Ecosystems
["Ubuntu:16.04:LTS","Ubuntu:18.04:LTS","Ubuntu:Pro:20.04:LTS","Ubuntu:22.04:LTS","Ubuntu:24.04:LTS","Ubuntu:25.10","Ubuntu:26.10","Ubuntu:26.04:LTS"]
Cvss Version
3.1
State
PUBLISHED

Threat ID: 6ad3f6802cdf04f6566671d5

Added to database: 10/17/2026, 22:28:16 UTC

Last enriched: 10/18/2026, 01:38:06 UTC

Last updated: 10/18/2026, 01:38:06 UTC

Views: 5

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