{"answers":{"affected":"1 open source package ship an affected version, including js-shared-modules.","exploited":"There is no known exploitation of MAL-2026-5098 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-2026-5098 is a malicious package in js-shared-modules, published on 31 May 2026."},"fix_prompt":"MAL-2026-5098 is a malicious package: js-shared-modules (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-2026-5098/ (Markdown: https://insights.sbomify.com/MAL-2026-5098/index.md)","id":"MAL-2026-5098","markdown":"https://insights.sbomify.com/MAL-2026-5098/index.md","name":"MAL-2026-5098","record":{"aliases":["GHSA-57xw-xm2f-j2wc"],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"package.json declares `\"postinstall\": \"node poc.js\"`, which fires automatically on every `npm install`. poc.js reads `os.hostname()`, hex-encodes it, and issues an HTTPS GET to `zcpesvvighyuzqlzkqgdydwp9jn54hfeg.oast.fun` (an Interactsh out-of-band callback host), exfiltrating the installer's hostname to a third-party canary. The package has no legitimate functionality — `index.js` is an empty `module.exports = {}` and the source banner self-identifies as a dependency-confusion proof-of-concept squatting a generic internal-style name (`js-shared-modules`) to shadow a private package. Any installer who resolves this public package leaks their host identity to the canary domain.\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 'js-shared-modules' @ 1.11.7 (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 js-shared-modules (npm)","id":"MAL-2026-5098","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":"js-shared-modules","purl":"pkg:npm/js-shared-modules","source":"MAL-2026-5098"}],"products":null,"published":"2026-05-31","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-2026-5098/"}