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CryptoJS Weak RNG Behind $5.7 Million in Drains Affects Five Crypto Wallet Apps

thehackernews.com 2026-08-06 fintech AI risk Critical

What Happened

Coinspect has identified CryptoJS.lib.WordArray.random() as the weak random number generator behind the Ill Bloom wallet drains. Introduced in the JavaScript cryptography library 12 years ago, the function supplied weak entropy that affected wallet apps used to generate recovery phrases. Coinspect's on-chain analysis puts the measured theft across two sweeps since late May at a lower bound of

Why It Matters

The report says a weak RNG in CryptoJS.lib.WordArray.random() was used by affected wallet apps to generate recovery phrases, and that this weakness contributed to at least $5.7 million in drains across five crypto wallet applications. It also states that phrases created through the vulnerable path remain guessable even if later imported into a hardware wallet, and that rehashing or a later package update cannot restore missing entropy.[1][5] From a RealGround perspective, this is a fintech supply-chain and secure-crypto implementation risk: teams should inventory dependent packages, identify whether any seed or key material was generated through the vulnerable function, and rotate exposed wallets or secrets immediately.[1][4]

Healthcare Fintech SaaS SMB AI startups

RealGround Analysis

This signal maps to fintech AI risk. Organizations using AI agents, LLM APIs, SaaS integrations, or sensitive data workflows should review whether this class of issue could create unauthorized tool execution, data leakage, weak approval gates, or unmanaged supply-chain exposure.

Recommended Actions

  • Restrict AI agent tool permissions and production write paths.
  • Review sensitive data access across prompts, logs, embeddings, memory, and SaaS integrations.
  • Add human approval workflows for high-impact or state-changing actions.
  • Run prompt injection and indirect prompt injection tests against affected workflows.
  • Document the owner, control gap, and remediation deadline for this risk class.

Source

https://thehackernews.com/2026/08/cryptojs-weak-rng-behind-57-million-in.html

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