Arbitrary file write via unchecked destination path
Published Apr 28, 2026 · Updated Apr 28, 2026
Path traversal in ef10007 MLOps_MCP 1.0.0 allows remote attackers to write files outside the intended directory through save_file. The save_file handler in fastmcp_server.py uses the caller-controlled filename or destination as a filesystem path without restricting resolution to an approved base directory. Any actor able to invoke the MCP tool can create or overwrite files writable by the server process, while read access or code execution is not established.
Summary
What happened
Path traversal in ef10007 MLOps_MCP 1.0.0 allows remote attackers to write files outside the intended directory through save_file. The save_file handler in fastmcp_server.py uses the caller-controlled filename or destination as a filesystem path without restricting resolution to an approved base directory. Any actor able to invoke the MCP tool can create or overwrite files writable by the server process, while read access or code execution is not established.
The record
- CVE
- CVE-2026-7213
- Published
- Apr 28, 2026
- Updated
- Apr 28, 2026
- Vendor
- ef10007
- Product
- MLOps_MCP
- Classifications
- CWE-22, T1105
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Apr 28, 2026CVE publishedPublication date reported by the CVE source.
- Apr 28, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=1.0.0
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- MLOps_MCP save_file proof of conceptproof of concept · unverified
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo