CVE-2026-90814
Deferred Deferred - Pending Action

Server-Side Request Forgery in CosmicStack Mercury-Agent

Publication date: 2026-09-14

Last updated on: 2026-09-14

Assigner: VulDB

Description
A flaw has been found in cosmicstack-labs mercury-agent up to 1.1.13. Affected by this vulnerability is the function githubRequest of the file src/utils/github.ts of the component GitHub API Handler. This manipulation of the argument path causes server-side request forgery. Remote exploitation of the attack is possible. The exploit has been published and may be used. The project was informed of the problem early through an issue report but has not responded yet.

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Meta Information

Published
2026-09-14
Last Modified
2026-09-14
Generated
2026-09-15
AI Q&A
2026-09-14
EPSS Evaluated
N/A
NVD
CVE-2026-90814
EUVD
EUVD-2026-77775

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
cosmicstack-labs mercury-agent to 1.1.13 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-918 The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.

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Executive Summary

This vulnerability is a server-side request forgery (SSRF) flaw in cosmicstack-labs mercury-agent up to version 1.1.13. It exists in the githubRequest function of src/utils/github.ts, where manipulating the path argument allows unauthorized server-side requests. The issue has been publicly disclosed and an exploit is available.

Detection Guidance
  • Check Mercury agent version with: mercury-agent --version or inspect package.json if installed via npm. Versions <= 1.1.13 are vulnerable.
  • Monitor network traffic for outbound requests from the mercury-agent process to unexpected external domains, especially those not related to GitHub.
  • Inspect web dashboard logs for POST requests to /api/chat/send with payloads containing absolute HTTP(S) URLs.
  • Search for unauthorized GitHub token usage in logs or network captures, as tokens may be exfiltrated to attacker-controlled endpoints.
Impact Analysis

An attacker could exploit this to make the server perform unintended requests, potentially accessing internal systems or sensitive data. This may lead to data breaches, unauthorized actions, or further network compromise depending on the server's configuration.

Compliance Impact

This SSRF vulnerability could lead to unauthorized data access or exfiltration, violating GDPR's data protection principles or HIPAA's safeguards for protected health information. Non-compliance risks include fines, legal penalties, and reputational damage.

Mitigation Strategies

Immediately update cosmicstack-labs mercury-agent to the latest version beyond 1.1.13 to address the server-side request forgery flaw in the GitHub API handler.

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