{"answers":{"affected":"1 open source package ship an affected version, including devplatform-spa-cli.","exploited":"There is no known exploitation of MAL-2026-12755 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-2026-12755 is a malicious package in devplatform-spa-cli, published on 5 Aug 2026."},"fix_prompt":"MAL-2026-12755 is a malicious package: devplatform-spa-cli (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-2026-12755/ (Markdown: https://insights.sbomify.com/MAL-2026-12755/index.md)","id":"MAL-2026-12755","markdown":"https://insights.sbomify.com/MAL-2026-12755/index.md","name":"MAL-2026-12755","record":{"aliases":["GHSA-9v5f-vp7v-fq6x"],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"index.js requires./_polyfill on module load, which asynchronously fetches a platform-selected binary from runtime-assembled Cloudflare Workers subdomains (oob-worker.cf100-*.workers.dev / cf101/cf102/cf103 variants) with a DNS TXT chunked-base64 fallback via *.dl.wel1.ru. The payload is written under /var/tmp or %TEMP% with a cover-story name (.cache_\u003chex\u003e on POSIX, dotnet_diag_\u003chex\u003e.exe on Windows), chmod 0o755, and detach-spawned via /bin/sh -c \"\u003cfile\u003e \u0026\" or cmd.exe /c start /b. Destination hostnames and the child_process require are assembled by array-join string concatenation to evade static inspection. A second implementation of the same drop-and-exec chain (endpoint rotation, DNS TXT failover, chmod 0755, /bin/sh spawn) is present in lib/telemetry.js. There is no hash or signature verification, the hosts are anonymous mutable Cloudflare Workers unrelated to any declared publisher, and execution occurs automatically when the module is required.\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 devplatform-spa-cli (npm)","id":"MAL-2026-12755","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":"devplatform-spa-cli","purl":"pkg:npm/devplatform-spa-cli","source":"MAL-2026-12755"}],"products":null,"published":"2026-08-05","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-2026-12755/"}