MCP Memory Keeper is an MCP server for persistent context management in AI coding assistants. Prior to 0.13.0, context_import in src/index.ts passes the caller-controlled filePath directly to fs.readFileSync without restricting the path to an export directory. An MCP client, including an LLM agent induced to call the tool, can use ../ traversal or an absolute path to target any file readable by the server process. A valid JSON file is parsed and imported into the caller's session, allowing its full contents to be retrieved through context_get or context_export, while JSON.parse errors for non-JSON files can return leading file bytes in a SyntaxError message. The two disclosure modes can expose other exported sessions, JSON credentials or service-account files, environment files, and portions of SSH keys or other local files. This issue is fixed in version 0.13.0.
{
"cna_assigner": "GitHub_M",
"cwe_ids": [
"CWE-209",
"CWE-22"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54561.json"
}{
"extracted_events": [
{
"range": [
{
"introduced": "0"
},
{
"fixed": "0.13.0"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"range": [
{
"fixed": "58640c22e037572e0b03bc0aa25d015ea98dcc6d"
}
],
"source": "REFERENCES_COMMIT"
},
{
"range": [
{
"fixed": "b9369568468007c85f8aec3ae09ca6f611285bc5"
}
],
"source": "REFERENCES_COMMIT"
},
{
"range": [
{
"fixed": "e0ab521a9e8343bcab1ca60ccc3601e4d86eaa97"
}
],
"source": "REFERENCES_COMMIT"
},
{
"original_tag": "v0.13.0",
"range": [
{
"fixed": "84f6dfa692736a34ff36e2d2cf2188b71facf73b"
}
],
"source": "REFERENCES_TAG"
}
]
}