{"answers":{"affected":"1 open source package ship an affected version, including dolyame-ui-overridestyles.","exploited":"There is no known exploitation of MAL-2026-13591 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-2026-13591 is a malicious package in dolyame-ui-overridestyles, published on 7 Aug 2026."},"fix_prompt":"MAL-2026-13591 is a malicious package: dolyame-ui-overridestyles (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-2026-13591/ (Markdown: https://insights.sbomify.com/MAL-2026-13591/index.md)","id":"MAL-2026-13591","markdown":"https://insights.sbomify.com/MAL-2026-13591/index.md","name":"MAL-2026-13591","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 the package, `_compat.js` invokes a setup() routine that downloads a platform-specific binary from Cloudflare Workers hosts assembled by joining split string fragments (oob-worker.cf99-9b3.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf102-baf.workers.dev), with a DNS-TXT chunked-base64 fallback across sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru. The fetched bytes are written to a cover-named file under TMP or /var/tmp (e.g., dotnet_diag_*.exe,.cache_*), chmod 0755 on Unix, and spawned detached via /bin/sh -c or cmd.exe. A second dropper path in lib/telemetry.js (loaded via the package `main`) reconstructs an executable from base64 buffers, chmods 0755, and spawns via /bin/sh. Hostnames, the `child_process` require, and `chmodSync` are constructed by concatenation to evade static scanners. No hash or signature verification is performed on the downloaded payloads. The purpose is inconsistent with the package's presented name (a UI style-override library).","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 dolyame-ui-overridestyles (npm)","id":"MAL-2026-13591","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":"dolyame-ui-overridestyles","purl":"pkg:npm/dolyame-ui-overridestyles","source":"MAL-2026-13591"}],"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-2026-13591/"}