{"answers":{"affected":"3 open source packages ship an affected version, including horizon. It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-43002 exists.","fix":"Upgrade horizon to 25.7.3 or later.","what":"CVE-2026-43002 is a medium-severity denial of service vulnerability in OpenStack Horizon, published on 5 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-43002 and fix it if it is affected.\n\nWhat it is: CVE-2026-43002 is a medium-severity denial of service vulnerability in OpenStack Horizon, published on 5 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-43002 exists.\n\nAffected packages and fixed versions:\n- horizon (PyPI): affected from 25.6; fixed in 25.7.3\n- horizon (PyPI): affected from 25.6; fixed in 25.7.3\n- horizon (PyPI): affected from 25.6; fixed in 25.7.3\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-43002/ (Markdown: https://insights.sbomify.com/CVE-2026-43002/index.md)","id":"CVE-2026-43002","markdown":"https://insights.sbomify.com/CVE-2026-43002/index.md","name":"CVE-2026-43002","record":{"aliases":["DEBIAN-CVE-2026-43002","GHSA-vxvf-xvm3-p8j5","PYSEC-2026-2520","UBUNTU-CVE-2026-43002"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"OpenStack Horizon","requires_auth":"none","summary":"Unauthenticated attackers can exhaust session storage in OpenStack Horizon by triggering write operations before authentication, causing denial of service.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"horizon","vendor":"openstack"}],"cvss":{"score":5.3,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","version":"3.1"},"cwes":[{"id":"CWE-696","name":"Incorrect Behavior Order"}],"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.","ecosystems":["PyPI"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"OpenStack Horizon has Incorrect Behavior Order","id":"CVE-2026-43002","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"PyPI","product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":3,"n_references":3,"next":{"headline":"OpenStack Ironic Python Agent Includes Functionality from Untrusted Control Sphere","id":"CVE-2026-43003"},"packages":[{"ecosystem":"PyPI","fixed":["25.7.3"],"introduced":["25.6"],"last_affected":[],"package":"horizon","purl":null,"source":"GHSA-vxvf-xvm3-p8j5"},{"ecosystem":"PyPI","fixed":["25.7.3"],"introduced":["25.6"],"last_affected":[],"package":"horizon","purl":"pkg:pypi/horizon","source":"GHSA-vxvf-xvm3-p8j5"},{"ecosystem":"PyPI","fixed":["25.7.3"],"introduced":["25.6"],"last_affected":[],"package":"horizon","purl":"pkg:pypi/horizon","source":"PYSEC-2026-2520"}],"prev":{"headline":"OpenStack Keystone has an Incorrect Authorization Issue","id":"CVE-2026-43001"},"products":["Horizon"],"published":"2026-05-05","related":[{"cvss_score":6.8,"headline":"OpenStack Horizon Session Fixation","id":"CVE-2012-2144","kev_date_added":null,"published":"2012-06-05"},{"cvss_score":6.1,"headline":"Horizon Web Dashboard Open Redirect vulnerability","id":"CVE-2022-45582","kev_date_added":null,"published":"2023-08-22"},{"cvss_score":6,"headline":"OpenStack Horizon RC file generation does not escape special characters in project names","id":"CVE-2026-55748","kev_date_added":null,"published":"2026-06-17"},{"cvss_score":5.8,"headline":"Open redirect in n/a","id":"CVE-2012-3540","kev_date_added":null,"published":"2012-09-05"},{"cvss_score":5.5,"headline":"Auth bypass in n/a","id":"CVE-2013-4471","kev_date_added":null,"published":"2014-05-14"},{"cvss_score":4.8,"headline":"OpenStack Horizon Cross-site Scripting (XSS)","id":"CVE-2017-7400","kev_date_added":null,"published":"2017-04-03"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CC BY 4.0","name":"PyPA Advisory Database","prefix":"PYSEC"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-05-06","vendors":["OpenStack"]},"summary":"Unauthenticated attackers can exhaust session storage in OpenStack Horizon by triggering write operations before authentication, causing denial of service.","url":"https://insights.sbomify.com/CVE-2026-43002/"}