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SHA-256

Every SHA-256 story we've curated in Bowl of Data, newest issue first — part of our weekly digest across AI, security, blockchain, and engineering.

5 items · 4 issues

Week 38 · 2026

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Week 32 · 2026

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  • Bitcoiners turn to dice throws as self-custody setups are re-evaluated

    A significant vulnerability in Coldcard hardware wallets' firmware led to a massive reduction in entropy, enabling attackers to steal over $100 million in Bitcoin. The flaw has prompted the cryptocurrency community to move away from trusting hardware-based random number generators in favor of auditable, physical entropy methods like dice rolling.

    Blockchain & Crypto CoinTelegraph Source ↗

Week 29 · 2026

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  • Bitcoin Covenants Part 4: OP_CHECKSIGFROMSTACK and OP_CAT

    This article explores the utility of proposed Bitcoin opcodes OP_CSFS and OP_CAT in creating advanced covenant functionalities. It details how these primitives can be used to enforce transaction templates through signature-based introspection.

    Blockchain & Crypto CoinTelegraph Source ↗

Week 19 · 2026

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  • Bleeding Llama: Critical Unauthenticated Memory Leak in Ollama (CVE-2026–7482)

    A critical vulnerability in Ollama allows unauthenticated attackers to trigger an out-of-bounds heap read via malicious GGUF files. This exploit can expose sensitive information like user messages and system prompts by leaking them into newly created model files.

    AI & ML Reddit r/netsec Source ↗
  • DigiCert: Misissued code signing certificates

    Threat actors compromised DigiCert support endpoints by sending malicious attachments through a customer chat channel. This breach enabled the unauthorized retrieval of certificate initialization codes, resulting in the misissuance of 60 code signing certificates.

    Cybersecurity Reddit r/netsec Source ↗