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Researcher earns $90k for Flask pickle RCE on Google devsite

2026-10-12 20:16 UTC · HN (vulnerability) · read the source ↗ #rce#flask#bug-bounty
  • Engineer — Learn: A concrete real-world example of pickle deserialization RCE via Flask session cookies — audit any internal Flask apps using custom pickle-backed session stores and prefer signed, non-pickle serialization formats instead.
  • SOC/IR — Learn: No active exploitation or IOCs to act on; the writeup is useful background on pickle deserialization as an RCE vector for future detection engineering, but yields no immediate hunt or rule work.
  • Leader — Skip
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