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ALTCHA Proof-of-Work Vulnerable to Challenge Splicing and Replay

🗓️ 07 Jul 2026 16:03:12Reported by Python Packaging AdvisoryType 
pypa
 pypa
🔗 github.com👁 23 Views

ALTCHA PoW flaw enables challenge splicing and replay via weak HMAC binding; patch available.

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Node
pypialtchaRange01.0.0

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07 Jul 2026 17:23Current
5.8Medium risk
Vulners AI Score5.8
CVSS 3.16.5
EPSS0.00463
SSVC
23