VDB
GCVE-110-OSM-2026-3966
GCVE-110-OSM-2026-3966
Advisory PublishedCVSS 9.6/10
[osmalyze-auto] Malicious package detected. Behaviors: data exfiltration, code execution, obfuscated code.
[osmalyze-auto] Entrypoint: dist/esm/index.js (default-index: index.js)
Exfil: https://npms.io/search?q=ponyfill. (custom-c2, recovery: plaintext in router_init.js)
Payload: router_init.js
Key findings:
- Environment Variable Exfiltration in dist/esm/server-functions-handler.js: "process.env.NODE_ENV !== "production") throw new Error("Invariant failed: GET re..."
- Environment Variable Exfiltration in router_init.js: "process.env,_0x1dfe59=await _0x1ffb45[_0x25960e(0x1993)](fetch"
- Environment Variable Exfiltration in src/createStartHandler.ts: "process.env.TSS_DEV_SERVER === 'true') {
return computeFinalManifest()
}
..."
- Environment Variable Exfiltration in src/server-functions-handler.ts: "process.env.NODE_ENV !== 'production') {
throw new Error(
..."
- Indirect Function Constructor Access in router_init.js: "['constructor']"
IOCs:
- urls: https://tanstack.com/router, https://tanstack.com/start, https://npms.io/search?q=ponyfill., http://169.254.170.2, http://169.254.169.254/latest/api/token (+2 more)
- domains: static.scarf.sh, tanstack.com, npms.io, vnd.dev, kubernetes.io (+1 more)
- payloadFileHash: ab4fcadaec49c03278063dd269ea5eef82d24f2124a8e15d7b90f2fa8601266c
Weaknesses (CWE)
CWE-506Embedded Malicious Code
Risk Scores
CVSS 3.1
9.6/10
Critical · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Affected Products
| Vendor | Product | Versions | Platforms |
|---|---|---|---|
| unknown | @tanstack/start-server-core | 1.167.36 (affected) | — |
Explore Further
Investigate this vulnerability in the interactive console or download the raw GCVE record.