{"answers":{"affected":"1 open source package ship an affected version, including checkout-resend-pos-order-sms-am.","exploited":"There is no known exploitation of MAL-2026-12590 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-2026-12590 is a malicious package in checkout-resend-pos-order-sms-am, published on 5 Aug 2026."},"fix_prompt":"MAL-2026-12590 is a malicious package: checkout-resend-pos-order-sms-am (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-2026-12590/ (Markdown: https://insights.sbomify.com/MAL-2026-12590/index.md)","id":"MAL-2026-12590","markdown":"https://insights.sbomify.com/MAL-2026-12590/index.md","name":"MAL-2026-12590","record":{"aliases":[],"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 this package, index.js loads _polyfill.js which reconstructs attacker-controlled hostnames via array-join concatenation (e.g. 'oob-worker.cf10x-*.workers.dev' variants) and issues an https.get to download a platform-specific executable. The bytes are written to /var/tmp/.cache_\u003crnd\u003e on Unix or %TEMP%\\dotnet_diag_\u003crnd\u003e.exe on Windows, chmodded to 0755, and spawned detached via spawn('/bin/sh', ['-c', \u003cpath\u003e + ' \u0026']) or the Windows equivalent. A DNS-TXT base64-chunk fallback via *.dl.wel1.ru resolvers is used when direct HTTPS fetch fails. The child_process module reference and 'chmodSync' string are also concatenated at runtime ('child_'+'process', 'chmod'+'Sync') to defeat static string matching. A sibling module lib/telemetry.js contains the same fetch/chmod-0755/sh-c-spawn dropper pattern, indicating shared payload infrastructure. The package's stated purpose (an SMS/POS order helper) is unrelated to downloading and executing native binaries from Cloudflare Workers subdomains, and the disguised on-disk filenames (.cache_*, dotnet_diag_*.exe) further indicate concealment rather than legitimate runtime setup.","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 checkout-resend-pos-order-sms-am (npm)","id":"MAL-2026-12590","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":"checkout-resend-pos-order-sms-am","purl":"pkg:npm/checkout-resend-pos-order-sms-am","source":"MAL-2026-12590"}],"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-2026-12590/"}