VDB

GCVE-110-OSM-2026-3966

GCVE-110-OSM-2026-3966
Advisory PublishedCVSS 9.6/10
Vulnetix · Advisory published May 11, 2026
[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

VendorProductVersionsPlatforms
unknown@tanstack/start-server-core1.167.36 (affected)

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