Medium severity · published Sep 14, 2026
CVE-2026-90813
cosmicstack-labs mercury-agent Shell Command Execution permissions.ts checkShellCommand validate before canonicalize
4.3
CVSS
0.6%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 46% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ME
mercury-agent · cosmicstack-labs
1.1.0; 1.1.1; 1.1.2; 1.1.3; 1.1.4; 1.1.5; +8 more · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-90813
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-90813
github.com
https://github.com/cosmicstack-labs/mercury-agent/
github.com
https://github.com/cosmicstack-labs/mercury-agent/issues/95
vuldb.com
https://vuldb.com/cve/CVE-2026-90813
vuldb.com
https://vuldb.com/submit/922879
vuldb.com
https://vuldb.com/vuln/403315
vuldb.com
https://vuldb.com/vuln/403315/cti
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