devplatform-spa-plugin-router (npm) · Malicious Code
Affects devplatform-spa-plugin-routerSource GCVE Database
Malicious package : remove devplatform-spa-plugin-router and rotate any secrets on hosts that installed it.
Data as of 6 Aug 2026, 18:24 UTC
Malicious package
Published to npm · OSV MAL-2026-12777
What to do
Remove devplatform-spa-plugin-router from every project, lockfile and image that pulls it in. Treat any host that installed it as compromised: rotate the credentials, tokens and keys it could read, from a clean machine.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| npmdevplatform-spa-plugin-router | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
Description
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (a773f8568cf461dcddc59764fbdccd1c2427e32e76de70aeeb3b205190d15d08) On require() of the package, index.js loads./_ext.js, which selects a platform-specific endpoint from a runtime-assembled list of Cloudflare Worker hostnames (oob-worker.cf99-9b3.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev) with a DNS-TXT fallback under *.dl.wel1.ru. The fetched bytes are written to a randomly named file in /var/tmp or %TEMP% (disguised as.cache_<hex> on Unix or dotnet_diag_<hex>.exe on Windows), chmodded to 0755, and spawned detached via /bin/sh -c or cmd.exe. Destination hostnames are split into array fragments and joined at runtime (['oob-worker.cf99','-9b3.workers','.de','v'].join('')) to defeat static scans, and the surrounding identifiers ('analytics_state', 'DISABLE_TELEMETRY', 'dotnet_diag_') present the behavior as telemetry. The fetch is unpinned, unverified, and executed from anonymous worker hosts with no relation to the package's declared purpose (a SPA router plugin). ## Source: ghsa-malware (b3f86e455b8cc322c2fa742eddaef6758e264d1c9a5f07b9511e0911ef074265) Any 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.