CVE-2026-90811 Information disclosure in mercury-agent
Local attackers can exploit a flaw in the Shell Permission Manifest to disclose sensitive information via the checkShellCommand function.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-90811?
CVE-2026-90811 is a medium-severity vulnerability in cosmicstack-labs mercury-agent, published on 14 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A weakness has been identified in cosmicstack-labs mercury-agent up to 1.2.0. This affects the function PermissionManager.checkShellCommand of the file mercury-agent/src/capabilities/permissions.ts of the component Shell Permission Manifest. Executing a manipulation can lead to information disclosure. The attack is restricted to local execution. The exploit has been made available to the public and could 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-2026-90811?
How do I fix CVE-2026-90811?
No fix has been published for CVE-2026-90811 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-90811 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-90811 exists.
Sources
Also known as GHSA-x845-4vjw-3f37.