{"id":"PYSEC-2026-2520","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.","aliases":["CVE-2026-43002","GHSA-vxvf-xvm3-p8j5"],"modified":"2026-07-13T16:31:57.272245536Z","published":"2026-07-13T15:15:37.289488Z","references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43002"},{"type":"WEB","url":"https://bugs.launchpad.net/horizon/+bug/2150331"},{"type":"PACKAGE","url":"https://github.com/openstack/horizon"},{"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":"PACKAGE","url":"https://pypi.org/project/horizon"},{"type":"ADVISORY","url":"https://github.com/advisories/GHSA-vxvf-xvm3-p8j5"}],"affected":[{"package":{"name":"horizon","ecosystem":"PyPI","purl":"pkg:pypi/horizon"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"25.6"},{"fixed":"25.7.3"}]}],"versions":["25.6.0","25.7.0","25.7.1","25.7.2"],"database_specific":{"source":"https://github.com/pypa/advisory-database/blob/main/vulns/horizon/PYSEC-2026-2520.yaml"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"}]}