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CVE-2026-90810

cosmicstack-labs mercury-agent Shell Command Permission Check permissions.ts PermissionManager.checkShellCommand improper authorization

MEDIUM
6.3
CVSS Score
Published: September 14, 2026 at 06:30 PM UTC
Updated: September 15, 2026 at 03:17 PM UTC
1 product affected across 1 vendorMercury Agent

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Severity
MEDIUM6.3
Exploit prediction
EPSS 0.4%
SSVC
PoC

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (6)

VDB EntryTechnical Description
Source: cverecord
https://vuldb.com/vuln/403312
SignaturePermissions Required
Source: cverecord
https://vuldb.com/vuln/403312/cti
Third Party Advisory
Source: cverecord
https://vuldb.com/cve/CVE-2026-90810
Third Party Advisory
Source: cverecord
https://vuldb.com/submit/922876
ExploitIssue Tracking
Source: cverecord
https://github.com/cosmicstack-labs/mercury-agent/issues/101
Product
Source: cverecord
https://github.com/cosmicstack-labs/mercury-agent/

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.3MEDIUMVulDB
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-285CWE-266

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