GHSA-97rm-xj73-33jh

Suggest an improvement
Source
https://github.com/advisories/GHSA-97rm-xj73-33jh
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/02/GHSA-97rm-xj73-33jh/GHSA-97rm-xj73-33jh.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-97rm-xj73-33jh
Aliases
Published
2026-02-19T20:27:11Z
Modified
2026-02-23T23:43:54.564312Z
Severity
  • 8.3 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H CVSS Calculator
Summary
eBay API MCP Server Affected by Environment Variable Injection
Details

The ebay_set_user_tokens tool allows updating the .env file with new tokens. The updateEnvFile function in src/auth/oauth.ts blindly appends or replaces values without validating them for newlines or quotes. This allows an attacker to inject arbitrary environment variables into the configuration file.

Impact

An attacker can inject arbitrary environment variables into the .env file. This could lead to: - Configuration Overwrites: Attackers can overwrite critical settings like EBAY_REDIRECT_URI to hijack OAuth flows. - Denial of Service: Injecting invalid configuration can prevent the server from starting. - Potential RCE: In some environments, controlling environment variables (like NODE_OPTIONS) can lead to Remote Code Execution.

Found with MCPwner 🕶

Database specific 
{
    "nvd_published_at": "2026-02-21T00:16:17Z",
    "github_reviewed_at": "2026-02-19T20:27:11Z",
    "github_reviewed": true,
    "cwe_ids": [
        "CWE-15",
        "CWE-74"
    ],
    "severity": "HIGH"
}
References

Affected packages

npm / ebay-mcp

Package

Name
ebay-mcp
View open source insights on deps.dev
Purl
pkg:npm/ebay-mcp

Affected ranges

Type
SEMVER
Events
Introduced
0Unknown introduced version / All previous versions are affected
Last affected
1.7.2

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/02/GHSA-97rm-xj73-33jh/GHSA-97rm-xj73-33jh.json"