CVE-2026-67990
Medium
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.
SeverityMedium
CVSS5.4
Exploit probability—
ProductBasecamp Upright
PublishedAug 13, 2026
First seenAug 13, 2026
Weakness typeCWE-352Cross-site request forgery (CSRF)
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| basecamp upright | No range specified | — |
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