What’s Vulnerable › Vulnerabilities

CVE-2026-49988: Repomix: attach_packed_output can bypass file-read secret scanning for supported local files

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-07-15 · updated 2026-10-24
• Weakness: CWE-200

Description

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

How to fix

Upgrade to a fixed version: yamadashy repomix 1.14.1. Check the vendor advisory for mitigations.

References

• https://github.com/yamadashy/repomix/commit/e447f7dba6f51fdb26bcad0c280542fca291960e
• https://github.com/yamadashy/repomix/releases/tag/v1.14.1
• https://github.com/yamadashy/repomix/security/advisories/GHSA-hwpp-h97w-2h3j
• https://github.com/yamadashy/repomix/security/advisories/GHSA-hwpp-h97w-2h3j

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