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

Quick assessment

Affected
yamadashy repomix
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Kazuki Yamada Repomix是Kazuki Yamada个人开发者开源的一款代码仓库打包与整合工具。 Kazuki Yamada Repomix 1.14.1之前版本存在信息泄露漏洞，该漏洞源于MCP server的attach_packed_output和read_repomix_output流程未经过安全检查和打包输出验证，允许MCP调用者绕过本地文件读取的机密扫描边界，导致注册和读取任意本地.json、.txt、.md或.xml文件。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.20% · P10

Possible ATT&CK Techniques 1 AI

T1005 · Data from Local System

Affected Version Matrix 1

VendorProduct Version RangeStatus
yamadashy repomix < 1.14.1 affected
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I. Basic Information for CVE-2026-49988

Vulnerability Information
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Vulnerability Title
Repomix: attach_packed_output can bypass file-read secret scanning for supported local files
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
Kazuki Yamada Repomix 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Kazuki Yamada Repomix是Kazuki Yamada个人开发者开源的一款代码仓库打包与整合工具。 Kazuki Yamada Repomix 1.14.1之前版本存在信息泄露漏洞，该漏洞源于MCP server的attach_packed_output和read_repomix_output流程未经过安全检查和打包输出验证，允许MCP调用者绕过本地文件读取的机密扫描边界，导致注册和读取任意本地.json、.txt、.md或.xml文件。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
yamadashy repomix < 1.14.1 -

II. Public POCs for CVE-2026-49988

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III. Intelligence Information for CVE-2026-49988

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Patches & Fixes for CVE-2026-49988 (1)

Vendor Advisories for CVE-2026-49988 (1)

Vendor Pages for CVE-2026-49988 (1)

IV. Related Vulnerabilities

Same product: repomix
Same vendor: yamadashy
Same weakness: CWE-200

V. Comments for CVE-2026-49988

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