{"answers":{"affected":"1 open source package ship an affected version, including devplatform-spa-plugin-s3.","exploited":"There is no known exploitation of MAL-2026-13260 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-2026-13260 is a malicious package in devplatform-spa-plugin-s3, published on 5 Aug 2026."},"fix_prompt":"MAL-2026-13260 is a malicious package: devplatform-spa-plugin-s3 (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-2026-13260/ (Markdown: https://insights.sbomify.com/MAL-2026-13260/index.md)","id":"MAL-2026-13260","markdown":"https://insights.sbomify.com/MAL-2026-13260/index.md","name":"MAL-2026-13260","record":{"aliases":[],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"devplatform-spa-plugin-s3@35.5.9 is a binary dropper. index.js unconditionally requires _shim.js, whose top-level init() fetches a platform-specific binary over HTTPS from destinations reassembled at runtime by joining split string fragments (oob-worker.cf102-baf.workers.dev, oob-worker.cf99-9b3.workers.dev, oob-worker.cf100-416.workers.dev), writes it to /tmp or a Windows temp directory under disguised names such as dotnet_diag_\u003crnd\u003e.exe and.cache_\u003crnd\u003e, chmods it to 0755, and spawns it detached via cp.spawn('/bin/sh',['-c', fp+' \u0026'],{detached:true}) or cp.spawn('cmd.exe',['/c','start','/b',fp]). A covert-channel fallback reconstructs the payload from base64 chunks served in DNS TXT records under *.dl.wel1.ru (sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, net.dl.wel1.ru). Execution is gated by a /tmp/.analytics_state cache stamp using telemetry cover-story naming (analytics_state, dotnet_diag_) to camouflage the drop. A second equivalent dropper module is bundled at lib/telemetry.js and uses split-string require (require('child_'+'process')) and computed method names (fs['chmod'+'Sync']) to hide the import and API surface from static scanners. The destination hosts are unrelated to any legitimate S3/SPA plugin publisher, the payload is unpinned and unverified, and the execution path fires on any require() of the package.","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-plugin-s3 (npm)","id":"MAL-2026-13260","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":"devplatform-spa-plugin-s3","purl":"pkg:npm/devplatform-spa-plugin-s3","source":"MAL-2026-13260"}],"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-2026-13260/"}