{"id":"CVE-2026-43002","aliases":["GHSA-vxvf-xvm3-p8j5","PYSEC-2026-2520"],"url":"https://o3.security/vulnerability/CVE-2026-43002","summary":"OpenStack Horizon has Incorrect Behavior Order","details":"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":"2026-05-05T00:00:00Z","modified":"2026-09-12T03:46:21.992378710Z","cvss":{"score":5.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"},"epss":{"score":0.00361,"percentile":0.29736,"asOf":"2026-09-17"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"horizon","fixedVersion":"25.7.3"}],"fix":null,"references":[{"type":"WEB","url":"https://bugs.launchpad.net/horizon/+bug/2150331"},{"type":"WEB","url":"https://security.openstack.org/ossa/OSSA-2026-009.html"},{"type":"WEB","url":"https://www.openwall.com/lists/oss-security/2026/05/05/7"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43002.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43002"},{"type":"PACKAGE","url":"https://github.com/openstack/horizon"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-12T03:46:21.992378710Z"}}