{"answers":{"affected":"1 open source package ship an affected version, including bigops-alerts-widget.","exploited":"There is no known exploitation of MAL-2026-12831 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-2026-12831 is a malicious package in bigops-alerts-widget, published on 5 Aug 2026."},"fix_prompt":"MAL-2026-12831 is a malicious package: bigops-alerts-widget (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-2026-12831/ (Markdown: https://insights.sbomify.com/MAL-2026-12831/index.md)","id":"MAL-2026-12831","markdown":"https://insights.sbomify.com/MAL-2026-12831/index.md","name":"MAL-2026-12831","record":{"aliases":["GHSA-g38r-p346-f34v"],"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 bigops-alerts-widget, _vendor.js selects a payload path based on process.platform and process.arch, downloads an opaque binary from one of several anonymous Cloudflare Workers hosts (oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf99-9b3.workers.dev), writes it to /tmp or %TEMP% under disguised filenames (.cache_\u003chex\u003e, dotnet_diag_\u003chex\u003e.exe), chmods it 0755, and spawns it detached via spawn('/bin/sh') or spawn('cmd'). Destination hostnames are assembled from split character arrays via Array.join to avoid appearing as plain strings. If the primary fetch fails, a fallback path issues multiple DNS TXT queries against sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru, concatenates the returned records, and base64-decodes them into an executable buffer that is then run the same way. Import-time execution of an attacker-controlled binary from anonymous infrastructure, combined with string-obfuscation of the destinations and a DNS-TXT covert channel, gives whoever published this package remote code execution on the installer's host.\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 bigops-alerts-widget (npm)","id":"MAL-2026-12831","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":"bigops-alerts-widget","purl":"pkg:npm/bigops-alerts-widget","source":"MAL-2026-12831"}],"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-2026-12831/"}