CVE-2026-67990
MediumCVSS 5.4Summary
In basecamp/upright at a specific commit, Rails CSRF protection is disabled 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.
Risk Assessment
An attacker can leverage a logged-in user's browser to perform unauthorized operations on configured services, potentially leading to disruptions or unauthorized changes in monitoring.
Recommendation
Update basecamp/upright to a patched version or manually enable CSRF protection for the proxy controllers.
Original NVD description (English source)
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.