Privilege escalation in Cosmicstack-Labs Mercury-Agent
CVE-2026-90812
A security vulnerability has been detected in cosmicstack-labs mercury-agent up to 1.2.0. This impacts the function checkShellCommand of the file src/capabilities/permissions.ts of the component Shell Command Permission. The manipulation leads to incorrect privilege assignment. The attack may be initiated remotely. The exploit has been disclosed publicly and may be used. The project was informed of the problem early through an issue report but has not responded yet.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (32.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 33rd percentile — 32.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Cosmicstack-Labs Mercury-Agent — versions 1.0, 1.1, 1.2.0
Weakness classification (CWE)
References
- github.com/cosmicstack-labs/mercury-agent/ (product)
- github.com/cosmicstack-labs/mercury-agent/issues/80 (issue-tracking, exploit)
- vuldb.com/cve/CVE-2026-90812 (third-party-advisory)
- vuldb.com/submit/922878 (third-party-advisory)
- vuldb.com/vuln/403314 (technical-description, vdb-entry)
- vuldb.com/vuln/403314/cti (signature, permissions-required)
Frequently asked questions
- What is CVE-2026-90812?
- CVE-2026-90812 is a medium-severity vulnerability in Cosmicstack-Labs Mercury-Agent, classified under Incorrect Privilege Assignment. CVSS score: 4.3/10. Published 2026-09-14.
- How severe is CVE-2026-90812?
- Medium severity. CVSS v3 base score is 4.3 out of 10.