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

Mon, 12 Oct 2026 20:16:55 +0000

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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