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    CVE-2026-43002

    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.

    Published:May 5, 2026
    Last Modified:May 6, 2026
    EPS:May 5, 2026
    EPSS Score:
    CVSS Score:5.3

    Affected Products

    Vendor
    Openstack
    Product
    Horizon

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-696 Incorrect Behavior Order

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-463 Padding Oracle Crypto Attack

    Related CVEs

    CVE-2026-55748 (CVSS 6) — OpenStack Horizon before 25.7.4 produces scripts for OpenStack RC file downloading that may have a crafted pro…
    CVE-2022-45582 (CVSS 6.1) — Open Redirect vulnerability in Horizon Web Dashboard 19.4.0 thru 20.1.4 via the success_url parameter.…
    CVE-2020-29565 (CVSS 6.1) — An issue was discovered in OpenStack Horizon before 15.3.2, 16.x before 16.2.1, 17.x and 18.x before 18.3.3, 1…
    CVE-2017-7400 (CVSS 4.8) — OpenStack Horizon 9.x through 9.1.1, 10.x through 10.0.2, and 11.0.0 allows remote authenticated administrator…
    CVE-2016-4428 (CVSS 5.4) — Cross-site scripting (XSS) vulnerability in OpenStack Dashboard (Horizon) 8.0.1 and earlier and 9.0.0 through …
    CVE-2015-3219 (CVSS 4.3) — Cross-site scripting (XSS) vulnerability in the Orchestration/Stack section in OpenStack Dashboard (Horizon) 2…
    CVE-2015-3988 (CVSS 3.5) — Multiple cross-site scripting (XSS) vulnerabilities in OpenStack Dashboard (Horizon) 2015.1.0 allow remote aut…
    CVE-2014-8124 (CVSS 5) — OpenStack Dashboard (Horizon) before 2014.1.3 and 2014.2.x before 2014.2.1 does not properly handle session re…
    CVE-2014-3594 (CVSS 3.5) — Cross-site scripting (XSS) vulnerability in the Host Aggregates interface in OpenStack Dashboard (Horizon) bef…
    CVE-2014-8578 (CVSS 3.5) — Cross-site scripting (XSS) vulnerability in the Groups panel in OpenStack Dashboard (Horizon) before 2013.2.4,…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High