CVE-2026-90810 Missing authorization in mercury-agent
Attackers can bypass shell command permission checks in mercury-agent to execute arbitrary commands remotely due to improper authorization.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-90810?
CVE-2026-90810 is a medium-severity missing authorization vulnerability in cosmicstack-labs mercury-agent, published on 14 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A security flaw has been discovered in cosmicstack-labs mercury-agent up to 1.1.13. The impacted element is the function PermissionManager.checkShellCommand of the file mercury-agent/src/capabilities/permissions.ts of the component Shell Command Permission Check. Performing a manipulation results in improper authorization. The attack can be initiated remotely. The exploit has been released to the public and may be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.
Which versions are affected by CVE-2026-90810?
How do I fix CVE-2026-90810?
No fix has been published for CVE-2026-90810 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-90810 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-90810 exists.
Sources
Also known as GHSA-xm72-m8gr-4jp8.