CVEvulnerability
CVE-2026-67990
5.4 MEDIUM
Official page ↗
- Status
- Deferred
- Published
- 2026-08-13
- Last modified
- 2026-09-08
- Assigner
- [email protected]
- CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
- 5.4 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
- Weaknesses
- CWE-352
Description
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.
Related
Weakness · CWE (1)
- CWE-352 Cross-Site Request Forgery weakness
References
- https://gist.github.com/Zykis1024/cec690012eecac53f408e78d2b569f06 gist.github.com
- https://github.com/basecamp/upright github.com
- https://github.com/basecamp/upright/blob/efe4f2e5254ac6e57e45d2261804cca74dbbca3f/app/controllers/upright/alertmanager_proxy_controller.rb#L2 github.com
- https://github.com/basecamp/upright/blob/efe4f2e5254ac6e57e45d2261804cca74dbbca3f/app/controllers/upright/prometheus_proxy_controller.rb#L2 github.com