Malicious code in mcp-server-notion (npm)
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (0423928197ec83ac273fa4a1b66d9e75398b956e7d5027014ff6326c552a46c2) Package occupies the unscoped name `mcp-server-notion` to catch misrouted installs of the scoped MCP Notion server. `package.json` declares `"postinstall": "node index.js"`, and `index.js` reads `os.hostname()`, `process.cwd()`, `process.env.npm_config_user_agent`, the Node version, and `os.platform()`, then POSTs them to `https://npx-canary-log.vulnerable-live.workers.dev/log`. The transmission fires automatically on `npm install` with no consent prompt or opt-in. The author self-describes the package as a security-research "canary," but the resulting behavior — squatting a confusable name and silently shipping installer host identifiers to a third-party Cloudflare Workers endpoint — is indistinguishable from a typosquat-and-beacon supply-chain attack, and the installer is not the consenting party. ## Source: ghsa-malware (972c9d835e33c8ceee2c472aafd539c0369bdd6099e09a7df1eb57b02f6b28a1) Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.
MAL-2026-5480
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:MAL-2026-5480
mcp-server-notion
Source reference: /affected/0/package/name
- Affected versions
- 0.0.1
Source reference:
/affected/0/versions0.0.2Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "SEMVER",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "mcp-server-notion",
"purl": "pkg:npm/mcp-server-notion",
"ecosystem": "npm"
},
"versions": [
"0.0.1",
"0.0.2"
],
"database_specific": {
"cwes": [
{
"name": "Embedded Malicious Code",
"cweId": "CWE-506",
"description": "The product contains code that appears to be malicious in nature."
},
{
"name": "Embedded Malicious Code",
"cweId": "CWE-506",
"description": "The product contains code that appears to be malicious in nature."
},
{
"name": "Embedded Malicious Code",
"cweId": "CWE-506",
"description": "The product contains code that appears to be malicious in nature."
}
],
"source": "https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/mcp-server-notion/MAL-2026-5480.json",
"indicators": {
"domains": [
"npx-canary-log.vulnerable-live.workers.dev"
],
"evidence_files": [
{
"path": "index.js",
"tlsh": "303195e190f805351bee46d3e2e9a899a36ff126360678f0b45e02691fc90980771cd2",
"sha256": "19b99229d1e68fb0aea2a14f275a7928666838f0fdbde293d5cdeb18c3e58c9a"
},
{
"path": "README.md",
"tlsh": "1021a32793c1623903d34a363944b6726b3b70b6334210b0f6dd455fea4282983734e6",
"sha256": "d11d537f6aefd2f34a00ec552205f365020a5fea1e2db9d94365644cef580db5"
}
],
"package_integrity": [
{
"hashes": {
"sha1": "5046887764ba0238288787a2b5d73e2dcabeee8a",
"sha512_sri": "sha512-zYVB4mPUBmYXgB5ih9AQguSXU88kUKAyGBWD5A4Jxo2LHe0LB8cDLSwtwCYjmgT09koMEOfhzvLztDoKBrwSDQ=="
},
"filename": "mcp-server-notion-0.0.1.tgz"
}
]
}
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #10866 · Revision 1
- Added to Heist Feed
- Publisher date