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TI-2026-36820 Aliases CVE-2026-49988GHSA-hwpp-h97w-2h3j

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

Priority MEDIUM 63CWE-200Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-200.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00184 7th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed repomix (yamadashy): 1.14.1repomix (npm): 1.14.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
yamadashyrepomixbefore 1.14.11.14.1Patch availableCNA
—repomix (npm)before 1.14.11.14.1Patch availableGHSA-hwpp-h97w-2h3j
  • repomix Vendoryamadashy Affected before 1.14.1 Fixed in 1.14.1 Patch available CNA
  • repomix (npm) Vendor— Affected before 1.14.1 Fixed in 1.14.1 Patch available GHSA-hwpp-h97w-2h3j

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:yamadashy:repomix:*:*:*:*:*:*:*:*before 1.14.1Vulnerableyamadashy
  • cpe:2.3:a:yamadashy:repomix:*:*:*:*:*:*:*:* Versions before 1.14.1 Vulnerable ·yamadashy

Remediation

  • Fix · CNA repomix (yamadashy) Fixed in 1.14.1
  • Fix · GHSA-hwpp-h97w-2h3j repomix (npm) Fixed in 1.14.1 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-49988
  2. 2026-10-03 Alias added: GHSA-hwpp-h97w-2h3j

References

Exploit 1

Patch 1

Other 2

  • TI-2026-36819 Repomix: Command Injection (RCE) via `--remote-branch` Argument Injection CVSS 4.0HIGH 7.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences