Why does a routine proxy upgrade silently corrupt state that five audits approved?
Szansa
Upgradeable proxy contracts are standard infrastructure, but when a new implementation adds, removes, or reorders storage variables without preserving the prior layout, state from the old version silently maps to wrong slots in the new one. The corruption produces no revert, no error event, and no on-chain signal, just a balance that is suddenly a wrong number or an access control slot that now points to an attacker address. The Kinto Protocol lost $1.55M in July 2025 when an uninitialized proxy was taken over through this vector, and a broader automated campaign in 2025 scanned newly deployed proxies across EVM chains to initialize them with malicious implementations before developers could act. OWASP's Smart Contract Top 10 for 2026 formally catalogs proxy and upgradeability vulnerabilities as SC10, confirming the category is recognized and still routinely exploited. Namespaced storage
Dlaczego to ważne
Storage layout compatibility is never checked at compile or deploy time, so every upgrade to a live contract ships with an assumption that no tooling currently verifies.
Jak oceniam szansę
Wskaźnik Szansy to mój własny odczyt, a nie pomiar: jak bardzo boli, jak często daje się we znaki i jak niewiele istnieje dziś, by to rozwiązać. Wyższy wynik oznacza, że uważam problem za bardziej warty zbudowania.
Ile bólu sprawia, gdy się pojawia.
Jak często ludzie faktycznie na to trafiają.
Jak mało dobrych narzędzi istnieje dla tego dziś.
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