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TI-2026-36819 Aliases CVE-2026-49987GHSA-9mm9-rqhj-j5mx

Repomix: Command Injection (RCE) via `--remote-branch` Argument Injection

Priority HIGH 68CWE-88Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Active
Attack complexity
Low
Attack requirements
Present
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-88.

Summary

Repomix is a tool that packs repositories into AI-friendly files. Prior to 1.14.1, src/core/git/gitCommand.ts execGitShallowClone passes the --remote-branch value directly to git fetch and git checkout without validation or --end-of-options, allowing --upload-pack or other Git option injection that bypasses validateGitUrl() dangerous parameter checks and can execute commands through local or SSH-style transports. This issue is fixed in version 1.14.1.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00698 53rd 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
Total

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-9mm9-rqhj-j5mx
  • 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-9mm9-rqhj-j5mx

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-9mm9-rqhj-j5mx repomix (npm) Fixed in 1.14.1 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-49987
  2. 2026-10-03 Alias added: GHSA-9mm9-rqhj-j5mx

References

Exploit 1

Patch 1

Other 2

  • TI-2026-36820 Repomix: attach_packed_output can bypass file-read secret scanning for supported local files CVSS 4.0MEDIUM 6.8

Sources

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