{"answers":{"affected":"1 open source package ship an affected version, including ue-jenkins-buildkite.","exploited":"There is no known exploitation of MAL-2026-6731 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-2026-6731 is a malicious package in ue-jenkins-buildkite, published on 2 Jul 2026."},"fix_prompt":"MAL-2026-6731 is a malicious package: ue-jenkins-buildkite (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-2026-6731/ (Markdown: https://insights.sbomify.com/MAL-2026-6731/index.md)","id":"MAL-2026-6731","markdown":"https://insights.sbomify.com/MAL-2026-6731/index.md","name":"MAL-2026-6731","record":{"aliases":["GHSA-8gxq-wrp7-qqv8"],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"ue-jenkins-buildkite@99999.0.0 is a dependency-confusion package targeting an internal Epic Games / Unreal Engine CI namespace (name evokes Jenkins/Buildkite tooling; version 99999.0.0 is the canonical shape used to win private-registry resolution). Its package.json preinstall script runs automatically on npm install and performs installer-side credential harvest: it collects os.hostname(), username, cwd, platform, and arch; probes CI-specific environment variables (HORDE_AGENT, GITHUB_ACTIONS, JENKINS_URL, TEAMCITY_VERSION); and enumerates process.env filtering by the regex /^(AWS_|GITHUB_|GH_|NPM_|EPIC_|UE_|HORDE_|P4|CI|BUILD|TOKEN|KEY|SECRET)/i, taking up to 30 matching variables. The collected data is POSTed as JSON over plain HTTP to the bare-IP endpoint http://109.123.247.172/npm/ue_jenkins_buildkite, and an out-of-band DNS beacon is issued to \u003chost\u003e-\u003cuser\u003e.ue_jenkins_buildkite.npm.epic-dc.oast.fun. The regex is a credential-shaped bulk scraper (AWS keys, GitHub tokens, npm publish tokens, generic *TOKEN*/*KEY*/*SECRET* variables) unrelated to any legitimate build-tool license check.\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 'ue-jenkins-buildkite' @ 99999.0.0 (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 ue-jenkins-buildkite (npm)","id":"MAL-2026-6731","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":"ue-jenkins-buildkite","purl":"pkg:npm/ue-jenkins-buildkite","source":"MAL-2026-6731"}],"products":null,"published":"2026-07-02","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-2026-6731/"}