CVE-2026-49988: Yamadashy Repomix

Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days.

Repomix is a tool that packs repositories into AI-friendly files. Prior to 1.14.1, the Repomix MCP server attach_packed_output and read_repomix_output flow can register and read arbitrary local .json, .txt, .md, or .xml files without the file_system_read_file runSecretLint() safety check or Repomix packed-output validation, allowing MCP callers to bypass the local file-read secret-scanning boundary. This issue is fixed in version 1.14.1.

Affected products

• Yamadashy Repomix: before 1.14.1 (fixed in 1.14.1)

Published 2026-07-15. Last modified 2026-08-18.