Vulnerability · Published Jul 15, 2026 · Assigned by GitHub_M

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

Medium 6.8

In plain English

A medium-severity information exposure in repomix from yamadashy. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 8% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)6.8Medium

Exploit odds (30 days)0.2%top 92.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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 packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	repomix	1.14.1	GHSA-hwpp-h97w-2h3j

Affected products (as reported)

Vendor	Product	Versions
yamadashy	repomix	< 1.14.1

Weakness: CWE-200 · Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

References

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