{"id":"CVE-2026-49299","aliases":["DEBIAN-CVE-2026-49299","EUVD-2026-33074","GHSA-xv24-hxh9-2hh9","PYSEC-2026-2678","UBUNTU-CVE-2026-49299"],"status":"published","title":"OpenStack Neutron has an Incorrect Authorization issue","description":"In OpenStack Neutron before 28.0.1, the tagging controller enforces plural policy action names on single-tag write operations while the defined policy rules use singular names. The mismatched names evaluate as allowed under the default policy, permitting a project reader to create and update tags on same-project resources. Deployments running Neutron 26.0.0 or later are affected.","severity":{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00295,"percentile":0.22369,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-863"],"published":"2026-05-28T21:53:03Z","modified":"2026-10-28T02:30:44Z","fixes":[{"ecosystem":"PyPI","package":"neutron","fixed_in":["28.0.1","27.0.3","26.0.4"],"sources":["ghsa","osv"]},{"ecosystem":"Debian:13","package":"neutron","fixed_in":["2:26.0.0-9+deb13u1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"neutron","fixed_in":["2:28.0.0-4"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"PyPI","package":"neutron","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"28.0.0"},{"fixed":"28.0.1"}]}]},{"source":"ghsa","ecosystem":"PyPI","package":"neutron","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"27.0.0"},{"fixed":"27.0.3"}]}]},{"source":"ghsa","ecosystem":"PyPI","package":"neutron","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"26.0.0"},{"fixed":"26.0.4"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"neutron","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2:21.0.0-7","2:21.0.0-7+deb12u1","2:22.0.0-1","2:22.0.0-2","2:22.0.0~rc1-1","2:22.0.0~rc1-2","2:22.0.1-1","2:22.0.1-2","2:23.0.0-1","2:23.0.0-2","2:23.0.0~b3-1","2:23.0.0~rc1-1","2:24.0.0-1","2:24.0.0-2","2:24.0.0-3","2:24.0.0-3.1","2:24.0.0~rc1-1","2:25.0.0-1","2:25.0.0-2","2:25.0.0-3","2:25.0.0-4","2:25.0.0-5","2:25.0.0~rc1-1","2:25.0.0~rc1-2","2:25.0.0~rc2-1","2:25.1.0-1","2:25.1.0-3","2:26.0.0-1","2:26.0.0-2","2:26.0.0-3","2:26.0.0-4","2:26.0.0-5","2:26.0.0-6","2:26.0.0-8","2:26.0.0-9","2:26.0.0~rc1-1","2:26.0.0~rc1-3","2:26.0.0~rc2-1","2:27.0.0-1","2:27.0.0~rc1-1","2:27.0.0~rc1-2","2:27.0.1-1","2:27.0.1-2","2:27.0.1-3","2:27.0.1-4","2:27.0.1-5","2:27.0.1-6","2:28.0.0-1","2:28.0.0-2","2:28.0.0-3","2:28.0.0-4","2:28.0.0-5","2:28.0.0-6","2:28.0.0-7","2:28.0.0-8","2:28.0.0-9","2:28.0.0~rc1-1","2:28.0.0~rc1-2","2:28.0.0~rc2-1","2:28.0.0~rc2-2","2:28.0.1-1","2:28.0.1-2","2:29.0.0-1","2:29.0.0~rc1-1","2:29.0.0~rc1-2","2:29.0.0~rc2-1"]},{"source":"osv","ecosystem":"Debian:13","package":"neutron","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:26.0.0-9+deb13u1"}]}],"versions":["2:26.0.0-9"]},{"source":"osv","ecosystem":"Debian:14","package":"neutron","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:28.0.0-4"}]}],"versions":["2:26.0.0-9","2:27.0.0-1","2:27.0.0~rc1-1","2:27.0.0~rc1-2","2:27.0.1-1","2:27.0.1-2","2:27.0.1-3","2:27.0.1-4","2:27.0.1-5","2:27.0.1-6","2:28.0.0-1","2:28.0.0-2","2:28.0.0-3","2:28.0.0~rc1-1","2:28.0.0~rc1-2","2:28.0.0~rc2-1","2:28.0.0~rc2-2"]},{"source":"osv","ecosystem":"PyPI","package":"neutron","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"28.0.0"},{"fixed":"28.0.1"}]}],"versions":["28.0.0"]},{"source":"osv","ecosystem":"PyPI","package":"neutron","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"27.0.0"},{"fixed":"27.0.3"}]}],"versions":["27.0.0","27.0.1","27.0.2"]},{"source":"osv","ecosystem":"PyPI","package":"neutron","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"26.0.0"},{"fixed":"26.0.4"}]}],"versions":["26.0.0","26.0.1","26.0.2","26.0.3"]},{"source":"osv","ecosystem":"PyPI","package":"neutron","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"26.0.0"},{"fixed":"26.0.4"},{"introduced":"27.0.0"},{"fixed":"27.0.3"},{"introduced":"28.0.0"},{"fixed":"28.0.1"}]}],"versions":["26.0.0","26.0.1","26.0.2","26.0.3","27.0.0","27.0.1","27.0.2","28.0.0"]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"neutron","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2:7.0.0-0ubuntu1","2:8.0.0~b1-0ubuntu2","2:8.0.0~b2-0ubuntu4","2:8.0.0~b2-0ubuntu5","2:8.0.0~b2-0ubuntu7","2:8.0.0~b3-0ubuntu1","2:8.0.0~rc1-0ubuntu1","2:8.0.0-0ubuntu1","2:8.1.0-0ubuntu0.16.04.2","2:8.1.2-0ubuntu1","2:8.2.0-0ubuntu1","2:8.3.0-0ubuntu1","2:8.3.0-0ubuntu1.1","2:8.3.0-0ubuntu1.2","2:8.4.0-0ubuntu1","2:8.4.0-0ubuntu2","2:8.4.0-0ubuntu3","2:8.4.0-0ubuntu4","2:8.4.0-0ubuntu5","2:8.4.0-0ubuntu6","2:8.4.0-0ubuntu7.1","2:8.4.0-0ubuntu7.2","2:8.4.0-0ubuntu7.3","2:8.4.0-0ubuntu7.4","2:8.4.0-0ubuntu7.5"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"neutron","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2:11.0.1-0ubuntu1","2:12.0.0~b1-0ubuntu1","2:12.0.0~b1-0ubuntu2","2:12.0.0~b2-0ubuntu1","2:12.0.0~b3-0ubuntu1","2:12.0.0~rc1-0ubuntu1","2:12.0.0~rc2-0ubuntu1","2:12.0.0-0ubuntu1","2:12.0.0-0ubuntu1.1","2:12.0.0-0ubuntu1.2","2:12.0.0-0ubuntu1.3","2:12.0.0-0ubuntu1.4","2:12.0.0-0ubuntu2","2:12.0.0-0ubuntu3","2:12.0.1-0ubuntu1","2:12.0.1-0ubuntu1.1","2:12.0.2-0ubuntu1","2:12.0.3-0ubuntu1","2:12.0.5-0ubuntu1","2:12.0.5-0ubuntu4","2:12.0.5-0ubuntu5","2:12.0.6-0ubuntu1","2:12.0.6-0ubuntu2","2:12.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OpenStack Neutron before 28.0.1, the tagging controller enforces plural policy action names on single-tag write operations while the defined policy rules use singular names. 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Deployments running Neutron 26.0.0 or later are affected.","status":"published","published":"2026-05-28T21:53:03Z","modified":"2026-06-02T17:33:09Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T18:20:55.651138Z"}],"ghsa":[{"id":"GHSA-xv24-hxh9-2hh9","title":"OpenStack Neutron has an Incorrect Authorization issue","description":"In OpenStack Neutron before 28.0.1, the tagging controller enforces plural policy action names on single-tag write operations while the defined policy rules use singular names. The mismatched names evaluate as allowed under the default policy, permitting a project reader to create and update tags on same-project resources. 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Deployments running Neutron 26.0.0 or later are affected.","status":"published","published":"2026-05-28T22:17:02.093Z","modified":"2026-07-21T10:10:00.103Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"}],"cwes":["CWE-863"],"updated_at":"2026-11-02T14:12:21.244426Z"}],"osv":[{"id":"CVE-2026-49299","description":"In OpenStack Neutron before 28.0.1, the tagging controller enforces plural policy action names on single-tag write operations while the defined policy rules use singular names. The mismatched names evaluate as allowed under the default policy, permitting a project reader to create and update tags on same-project resources. Deployments running Neutron 26.0.0 or later are affected.","status":"published","published":"2026-05-28T21:53:03.408Z","modified":"2026-10-28T02:30:44.802707569Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","level":"medium"}],"cwes":["CWE-863"],"updated_at":"2026-11-02T15:45:07.060148Z"},{"id":"DEBIAN-CVE-2026-49299","description":"In OpenStack Neutron before 28.0.1, the tagging controller enforces plural policy action names on single-tag write operations while the defined policy rules use singular names. The mismatched names evaluate as allowed under the default policy, permitting a project reader to create and update tags on same-project resources. Deployments running Neutron 26.0.0 or later are affected.","status":"published","published":"2026-05-28T22:17:02.093Z","modified":"2026-10-01T03:03:16.482940043Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium"}],"updated_at":"2026-11-02T15:45:56.444225Z"},{"id":"GHSA-xv24-hxh9-2hh9","title":"OpenStack Neutron has an Incorrect Authorization issue","description":"In OpenStack Neutron before 28.0.1, the tagging controller enforces plural policy action names on single-tag write operations while the defined policy rules use singular names. The mismatched names evaluate as allowed under the default policy, permitting a project reader to create and update tags on same-project resources. Deployments running Neutron 26.0.0 or later are affected.","status":"published","published":"2026-05-29T00:38:33Z","modified":"2026-07-13T16:42:31.204793899Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","level":"medium"}],"cwes":["CWE-863"],"updated_at":"2026-11-02T15:47:00.198893Z"},{"id":"PYSEC-2026-2678","title":"OpenStack Neutron has an Incorrect Authorization issue","description":"In OpenStack Neutron before 28.0.1, the tagging controller enforces plural policy action names on single-tag write operations while the defined policy rules use singular names. The mismatched names evaluate as allowed under the default policy, permitting a project reader to create and update tags on same-project resources. Deployments running Neutron 26.0.0 or later are affected.","status":"published","published":"2026-07-13T15:19:13.790301Z","modified":"2026-07-13T16:32:15.340156911Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T15:52:55.961245Z"},{"id":"UBUNTU-CVE-2026-49299","description":"In OpenStack Neutron before 28.0.1, the tagging controller enforces plural policy action names on single-tag write operations while the defined policy rules use singular names. The mismatched names evaluate as allowed under the default policy, permitting a project reader to create and update tags on same-project resources. Deployments running Neutron 26.0.0 or later are affected.","status":"published","published":"2026-05-28T22:17:00Z","modified":"2026-10-28T01:07:33.631665791Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T16:56:33.391918Z"}]}}