CRLF Injection Affecting ebay-mcp package, versions <1.7.3
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JS-EBAYMCP-15325868
- published23 Feb 2026
- disclosed19 Feb 2026
- creditnedlir
Introduced: 19 Feb 2026
NewCVE-2026-27203 (opens in a new tab)How to fix?
Upgrade ebay-mcp to version 1.7.3 or higher.
Overview
ebay-mcp is a Local MCP server for eBay APIs - provides access to eBay developer functionality through MCP (Model Context Protocol)
Affected versions of this package are vulnerable to CRLF Injection via the updateEnvFile() function of the ebay_set_user_tokens tool. An attacker can inject arbitrary environment variables into the configuration file by supplying values containing newlines or quotes, potentially overwriting critical settings, hijacking OAuth flows, causing denial of service, or enabling remote code execution in certain environments.