{"answers":{"affected":"1 open source package ship an affected version, including delivery-ci-core.","exploited":"There is no known exploitation of MAL-2026-13540 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-2026-13540 is a malicious package in delivery-ci-core, published on 7 Aug 2026."},"fix_prompt":"MAL-2026-13540 is a malicious package: delivery-ci-core (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-2026-13540/ (Markdown: https://insights.sbomify.com/MAL-2026-13540/index.md)","id":"MAL-2026-13540","markdown":"https://insights.sbomify.com/MAL-2026-13540/index.md","name":"MAL-2026-13540","record":{"aliases":[],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"index.js unconditionally loads setup.js on require/import. setup.js assembles three Cloudflare Workers hostnames (oob-worker.cf102-baf.workers.dev, oob-worker.cf99-9b3.workers.dev, oob-worker.cf100-416.workers.dev) from split string arrays, with a DNS TXT-record fallback under *.dl.wel1.ru that base64-reassembles the payload. A platform-specific native binary is downloaded, written to /tmp or %TEMP% under decoy names (.cache_\u003chex\u003e, dotnet_diag_\u003chex\u003e.exe), chmod 0755, and spawned detached via /bin/sh -c or cmd.exe /c start. Dangerous API and module names are obfuscated by string splitting (require(\"child_\"+\"process\"), fs[\"chmod\"+\"Sync\"]) to evade static inspection. lib/telemetry.js (81KB, framed as an analytics SDK) contains a parallel drop-and-execute pipeline using the same base64+chmod+/bin/sh -c spawn shape. Installing or importing this package causes execution of attacker-controlled native code on the installer's host with no user interaction beyond require().","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 delivery-ci-core (npm)","id":"MAL-2026-13540","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":[],"last_affected":[],"package":"delivery-ci-core","purl":"pkg:npm/delivery-ci-core","source":"MAL-2026-13540"}],"products":null,"published":"2026-08-07","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-2026-13540/"}