CVE-2026-67990
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | n/a |
| Product | n/a |
| Published | Aug 13, 2026 |
| Last Updated | Aug 13, 2026 |
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Affected Versions
n/a / n/a
n/a
References
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 gist.github.com: https://gist.github.com/Zykis1024/cec690012eecac53f408e78d2b569f06