{"answers":{"affected":"1 open source package ship an affected version, including @monitoring-lib/error-tracking.","exploited":"There is no known exploitation of MAL-2026-5540 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-2026-5540 is a malicious package in @monitoring-lib/error-tracking, published on 11 Jun 2026."},"fix_prompt":"MAL-2026-5540 is a malicious package: @monitoring-lib/error-tracking (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-2026-5540/ (Markdown: https://insights.sbomify.com/MAL-2026-5540/index.md)","id":"MAL-2026-5540","markdown":"https://insights.sbomify.com/MAL-2026-5540/index.md","name":"MAL-2026-5540","record":{"aliases":["GHSA-5g45-cfrj-qc64"],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"On `npm install`, the `preinstall` lifecycle hook in package.json runs a Node one-liner that reads the installer's hostname (`os.hostname()`) and username (`os.userInfo().username`) and transmits them to an attacker-controlled Interactsh/OAST callback domain via two channels: an HTTPS GET request to `https://d8ks495t5p5ut2enft8041g7fusnfsy5e.oast.site/?h=\u003chostname\u003e\u0026u=\u003cusername\u003e` and a DNS lookup of `monitoring-lib.\u003chostname\u003e.d8ks495t5p5ut2enft8041g7fusnfsy5e.oast.site`. The package name uses a generic scope (`@monitoring-lib`) that does not correspond to a known publisher, and the version number `9999.0.0` is the canonical shape of a dependency-confusion attack — a public registry upload designed to override an organization's internal package of the same name. Combined, the package is a supply-chain recon beacon: any installer that resolves to this version leaks its host identity to the attacker, identifying victims whose private-registry configurations failed.\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.\n\nThe OpenSSF Package Analysis project identified '@monitoring-lib/error-tracking' @ 9999.0.0 (npm) as malicious.\n\nIt is considered malicious because:\n\n- The package communicates with a domain associated with malicious activity.","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 @monitoring-lib/error-tracking (npm)","id":"MAL-2026-5540","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":"@monitoring-lib/error-tracking","purl":"pkg:npm/%40monitoring-lib%2Ferror-tracking","source":"MAL-2026-5540"}],"products":null,"published":"2026-06-11","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-2026-5540/"}