{"answers":{"affected":"1 open source package ship an affected version, including eacq-payform-core.","exploited":"There is no known exploitation of MAL-2026-11538 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-2026-11538 is a malicious package in eacq-payform-core, published on 4 Aug 2026."},"fix_prompt":"MAL-2026-11538 is a malicious package: eacq-payform-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-2026-11538/ (Markdown: https://insights.sbomify.com/MAL-2026-11538/index.md)","id":"MAL-2026-11538","markdown":"https://insights.sbomify.com/MAL-2026-11538/index.md","name":"MAL-2026-11538","record":{"aliases":["GHSA-gpp6-qxfg-2m7x"],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"On require() of the package, index.js loads _vendor.js which selects a platform-specific endpoint, fetches an opaque binary over HTTPS from Cloudflare Workers subdomains whose hostnames are reconstructed at runtime by joining split string fragments (e.g. \"oob-worker.cf102-ba\"+\"f.w\"+\"orkers.dev\"), with a DNS TXT chunked-base64 fallback channel (c.\u003cdomain\u003e for chunk count, then N.\u003cdomain\u003e TXT queries reassembled via Buffer.from(parts.join(\"\"), \"base64\")). The fetched bytes are written under a disguised name (dot-file or dotnet_diag masquerade) in /var/tmp or %TEMP%, chmod 0o755 on POSIX, then detached-spawned via /bin/sh -c or cmd.exe. Package advertises itself only as a 'platform core' with no legitimate need for platform-detected binary execution. Host strings are deliberately fragmented to evade static analysis; a rate-limit marker is written to /tmp/.analytics_state or %TEMP%\\analytics_state.\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 eacq-payform-core (npm)","id":"MAL-2026-11538","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":"eacq-payform-core","purl":"pkg:npm/eacq-payform-core","source":"MAL-2026-11538"}],"products":null,"published":"2026-08-04","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-2026-11538/"}