Vulnerability in Cosmicstack-Labs Mercury-Agent
CVE-2026-90813
A vulnerability was detected in cosmicstack-labs mercury-agent up to 1.1.13. Affected is the function checkShellCommand of the file src/capabilities/permissions.ts of the component Shell Command Execution. The manipulation results in incorrect behavior order: validate before canonicalize. The attack may be launched remotely. The exploit is now public 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: 0.006 (46.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 46th percentile — 46.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
- Cosmicstack-Labs Mercury-Agent — versions 1.1.0, 1.1.1, 1.1.10
Weakness classification (CWE)
References
- vuldb.com/vuln/403315 (technical-description, vdb-entry)
- vuldb.com/vuln/403315/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-90813 (third-party-advisory)
- vuldb.com/submit/922879 (third-party-advisory)
- github.com/cosmicstack-labs/mercury-agent/issues/95 (issue-tracking, exploit)
- github.com/cosmicstack-labs/mercury-agent/ (product)
Frequently asked questions
- What is CVE-2026-90813?
- CVE-2026-90813 is a medium-severity vulnerability in Cosmicstack-Labs Mercury-Agent, classified under CWE-179. CVSS score: 4.3/10. Published 2026-09-14.
- How severe is CVE-2026-90813?
- Medium severity. CVSS v3 base score is 4.3 out of 10.