CVE-2026-67990 Cross-site request forgery in n/a
An attacker can trick logged-in users into triggering unauthorized actions on upstream monitoring services via disabled CSRF protection in proxy controllers.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-67990?
CVE-2026-67990 is a medium-severity vulnerability in n/a, published on 13 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-352
Which versions are affected by CVE-2026-67990?
How do I fix CVE-2026-67990?
No fix has been published for CVE-2026-67990 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-67990 being exploited?
There is no known exploitation of CVE-2026-67990 in the wild and no public exploit code.
Sources
Also known as GHSA-q9r6-h8cx-q7qp.