Information disclosure in Cosmicstack-Labs Mercury-Agent
CVE-2026-90811
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.
Vulnerability class: Information Disclosure
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.3 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.001 (4.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 4th percentile — 4.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000
Affected products
- Cosmicstack-Labs Mercury-Agent — versions 1.0, 1.1, 1.2.0
Weakness classification (CWE)
References
- vuldb.com/vuln/403313 (technical-description, vdb-entry)
- vuldb.com/vuln/403313/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-90811 (third-party-advisory)
- vuldb.com/submit/922877 (third-party-advisory)
- github.com/cosmicstack-labs/mercury-agent/issues/102 (issue-tracking, exploit)
- github.com/cosmicstack-labs/mercury-agent/ (product)
Frequently asked questions
- What is CVE-2026-90811?
- CVE-2026-90811 is a low-severity vulnerability in Cosmicstack-Labs Mercury-Agent, classified under Information Disclosure. CVSS score: 3.3/10. Published 2026-09-14.
- How severe is CVE-2026-90811?
- Low severity. CVSS v3 base score is 3.3 out of 10.