CVE-2026-90811: Information Disclosure in cosmicstack-labs mercury-agent
CVE-2026-90811 is a medium severity information disclosure vulnerability in cosmicstack-labs mercury-agent versions 1.0, 1.1, and 1.2.0. It affects the PermissionManager.checkShellCommand function in the Shell Permission Manifest component. The vulnerability requires local execution and allows an attacker with limited privileges to disclose information. The issue was reported early to the project but remains unaddressed. Public exploit code is available, though no active exploitation in the wild is known.
AI Analysis
Technical Summary
This vulnerability exists in cosmicstack-labs mercury-agent up to version 1.2.0, specifically in the PermissionManager.checkShellCommand function within the mercury-agent/src/capabilities/permissions.ts file. A manipulation of this function can lead to information disclosure. The attack vector is local, requiring at least limited privileges, and does not require user interaction. The vulnerability has a CVSS 4.8 (medium) score and was responsibly disclosed to the project, which has not yet responded. Public exploit code is available.
Potential Impact
An attacker with local access and limited privileges can exploit this vulnerability to disclose information from the affected system. There is no indication of remote exploitation or privilege escalation. The impact is limited to information disclosure without further compromise.
Mitigation Recommendations
No official fix or patch is currently available, and the vendor has not responded to the issue report. Users should restrict local access to trusted users only and monitor for suspicious local activity. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance.
CVE-2026-90811: Information Disclosure in cosmicstack-labs mercury-agent
Description
CVE-2026-90811 is a medium severity information disclosure vulnerability in cosmicstack-labs mercury-agent versions 1.0, 1.1, and 1.2.0. It affects the PermissionManager.checkShellCommand function in the Shell Permission Manifest component. The vulnerability requires local execution and allows an attacker with limited privileges to disclose information. The issue was reported early to the project but remains unaddressed. Public exploit code is available, though no active exploitation in the wild is known.
CVSS v4.0
Score 4.8medium
Affected software
cosmicstack-labs
mercury-agent
pkg:github/cosmicstack-labs/mercury-agentcpe:2.3:a:cosmicstack-labs:mercury-agent:*:*:*:*:*:*:*:*Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability exists in cosmicstack-labs mercury-agent up to version 1.2.0, specifically in the PermissionManager.checkShellCommand function within the mercury-agent/src/capabilities/permissions.ts file. A manipulation of this function can lead to information disclosure. The attack vector is local, requiring at least limited privileges, and does not require user interaction. The vulnerability has a CVSS 4.8 (medium) score and was responsibly disclosed to the project, which has not yet responded. Public exploit code is available.
Potential Impact
An attacker with local access and limited privileges can exploit this vulnerability to disclose information from the affected system. There is no indication of remote exploitation or privilege escalation. The impact is limited to information disclosure without further compromise.
Mitigation Recommendations
No official fix or patch is currently available, and the vendor has not responded to the issue report. Users should restrict local access to trusted users only and monitor for suspicious local activity. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-09-13T16:29:45.144Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6aa8483f55bf5e2cf57d35f2
Added to database: 09/14/2026, 19:17:19 UTC
Last enriched: 09/14/2026, 19:31:32 UTC
Last updated: 09/14/2026, 19:48:11 UTC
Views: 5
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.