{"answers":{"affected":"1 open source package ship an affected version, including mcp-server-notion.","exploited":"There is no known exploitation of MAL-2026-5480 in the wild and no public exploit code.","fix":"Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.","what":"MAL-2026-5480 is a malicious package in mcp-server-notion, published on 9 Jun 2026."},"fix_prompt":"MAL-2026-5480 is a malicious package: mcp-server-notion (npm). Every version was published to cause harm.\n\nTask:\n1. Search this repository's dependency manifests and lockfiles for the package, including transitive dependencies.\n2. If it is present, remove it, regenerate the lockfile with the project's package manager, and replace whatever it was used for.\n3. List any CI runners, developer machines or containers that installed it, so their secrets can be rotated.\n4. If the package is not used anywhere, say so and change nothing.\n\nReference: https://insights.sbomify.com/MAL-2026-5480/ (Markdown: https://insights.sbomify.com/MAL-2026-5480/index.md)","id":"MAL-2026-5480","markdown":"https://insights.sbomify.com/MAL-2026-5480/index.md","name":"MAL-2026-5480","record":{"aliases":["GHSA-56wr-9mvj-77pf","GHSA-mx42-9xv4-vm87","SNYK-JS-MCPSERVERNOTION-19161387"],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"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.\n\nAny 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.","ecosystems":["npm"],"exploits":{"exploitdb":null,"first_seen":null,"github_poc":null,"max_poc_stars":null,"metasploit":null,"nuclei":null,"refs":[],"tier":null},"has_fix":false,"headline":"Malicious code in mcp-server-notion (npm)","id":"MAL-2026-5480","indexable":true,"kev":null,"kind":"malicious","links":{"ecosystem":"npm","product":null,"products":[],"type":null,"year":"2026"},"n_packages":1,"n_references":null,"packages":[{"ecosystem":"npm","fixed":[],"introduced":["0"],"last_affected":[],"package":"mcp-server-notion","purl":"pkg:npm/mcp-server-notion","source":"MAL-2026-5480"}],"products":null,"published":"2026-06-09","related":[],"sources":[{"class":"attribution","licence":"Apache-2.0","name":"OpenSSF Malicious Packages","prefix":"MAL"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":null,"updated":null,"vendors":null},"summary":null,"url":"https://insights.sbomify.com/MAL-2026-5480/"}