VDB-403315 · Submit #922879 · CVE-2026-90813

cosmicstack-labs mercury-agent up to 1.1.13 Shell Command Execution permissions.ts checkShellCommand validate before canonicalize

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
3.9	$0-$5k	1.08

Summaryinfo

A vulnerability has been found in cosmicstack-labs mercury-agent up to 1.1.13 and classified as problematic. Affected by this vulnerability is the function checkShellCommand of the file src/capabilities/permissions.ts of the component Shell Command Execution. This manipulation causes validate before canonicalize. This vulnerability is registered as CVE-2026-90813. Remote exploitation of the attack is possible. Furthermore, an exploit is available. The project was informed of the problem early through an issue report but has not responded yet.

Detailsinfo

A vulnerability was found in cosmicstack-labs mercury-agent up to 1.1.13. It has been declared as problematic. Affected by this vulnerability is the function checkShellCommand of the file src/capabilities/permissions.ts of the component Shell Command Execution. The manipulation with an unknown input leads to a validate before canonicalize vulnerability. The CWE definition for the vulnerability is CWE-180. The product validates input before it is canonicalized, which prevents the product from detecting data that becomes invalid after the canonicalization step. As an impact it is known to affect confidentiality.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-90813. The exploitation appears to be easy. The attack can be launched remotely. Technical details and also a public exploit are known.

It is possible to download the exploit at github.com. It is declared as proof-of-concept. The project was informed of the problem early through an issue report but has not responded yet.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

cosmicstack-labs

Name

mercury-agent

Version

Website

Product: https://github.com/cosmicstack-labs/mercury-agent/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 3.9

VulDB Base Score: 4.3
VulDB Temp Score: 3.9
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Validate before canonicalize
CWE: CWE-180 / CWE-179 / CWE-20
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒
Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

09/13/2026 Advisory disclosed
09/13/2026 +0 days VulDB entry created
09/13/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: 95
Status: Not defined

CVE: CVE-2026-90813 (🔒)
GCVE (CVE): GCVE-0-2026-90813
GCVE (VulDB): GCVE-100-403315
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 09/13/2026 18:35
Changes: 09/13/2026 18:35 (58)
Complete: 🔍
Submitter: Eric-a
Cache ID: 216::103

Submitinfo

Accepted

Submit #922879: CosmicStack Labs Mercury Agent (@cosmicstack/mercury-agent) <= 1.1.13 Incorrect Behavior Order - Validate Before Canonicalize (CWE-180) / Authorization Bypass / Path Traversal (by Eric-a)