{"answers":{"affected":"1 open source package ship an affected version, including mcp-server-postgres.","exploited":"There is no known exploitation of MAL-2026-5481 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-2026-5481 is a malicious package in mcp-server-postgres, published on 9 Jun 2026."},"fix_prompt":"MAL-2026-5481 is a malicious package: mcp-server-postgres (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-2026-5481/ (Markdown: https://insights.sbomify.com/MAL-2026-5481/index.md)","id":"MAL-2026-5481","markdown":"https://insights.sbomify.com/MAL-2026-5481/index.md","name":"MAL-2026-5481","record":{"aliases":["GHSA-vm2g-qj5x-x234"],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"Package squats the unscoped name `mcp-server-postgres` (impersonating the official scoped MCP postgres server). package.json declares `\"postinstall\": \"node index.js\"`, which fires unconditionally on `npm install`. index.js loads `os`, `https`, and `http`, then POSTs a JSON body containing `os.hostname()`, `process.cwd()`, the npm user-agent, Node version, and `os.platform()` to a hardcoded Cloudflare Workers endpoint at `https://npx-canary-log.vulnerable-live.workers.dev/log`. Installers and CI systems running `npm install` or `npx mcp-server-postgres` leak host identifiers and working-directory paths to a third-party endpoint without consent. Although the author self-describes the package as a 'canary' for npx-confusion research, the typosquat name combined with unsolicited install-time host telemetry exfiltration constitutes a supply-chain attack against installers.\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-postgres (npm)","id":"MAL-2026-5481","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-postgres","purl":"pkg:npm/mcp-server-postgres","source":"MAL-2026-5481"}],"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-2026-5481/"}