{"id":"CVE-2026-67990","details":"basecamp/upright at commit efe4f2e5254ac6e57e45d2261804cca74dbbca3f disables Rails CSRF protection for its Alertmanager and Prometheus proxy controllers. An unauthenticated attacker can induce a logged-in user's browser to submit requests that are forwarded to enabled upstream write or management endpoints, such as creating an Alertmanager silence or requesting a Prometheus reload. The final impact depends on the APIs enabled by the upstream services.","modified":"2026-10-28T02:31:06.803232694Z","published":"2026-08-13T00:00:00Z","database_specific":{"cna_assigner":"mitre","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/67xxx/CVE-2026-67990.json"},"references":[{"type":"WEB","url":"https://gist.github.com/Zykis1024/cec690012eecac53f408e78d2b569f06"},{"type":"WEB","url":"https://github.com/basecamp/upright/blob/efe4f2e5254ac6e57e45d2261804cca74dbbca3f/app/controllers/upright/alertmanager_proxy_controller.rb#L2"},{"type":"WEB","url":"https://github.com/basecamp/upright/blob/efe4f2e5254ac6e57e45d2261804cca74dbbca3f/app/controllers/upright/prometheus_proxy_controller.rb#L2"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/67xxx/CVE-2026-67990.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-67990"},{"type":"PACKAGE","url":"https://github.com/basecamp/upright"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/basecamp/upright","events":[{"introduced":"0"},{"last_affected":"efe4f2e5254ac6e57e45d2261804cca74dbbca3f"}],"database_specific":{"extracted_events":[{"source":"DESCRIPTION","range":[{"introduced":"0"},{"last_affected":"efe4f2e5254ac6e57e45d2261804cca74dbbca3f"}]}]}}],"versions":["v0.3.0","v0.2.0","v0.1.2"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-67990.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N"}]}