# Hidden Inflation Becomes the Core Risk of Shielded Chains

Because shielded pools hide amounts, bugs that create coins can sit undetected for years, so privacy chains will keep facing rollbacks, shutdowns and bridge-side supply checks as review of their old code accelerates.

- Conviction: 40 / 100 (forming)
- Horizon: Emerging (watchlist)
- Tracking since: 2026-11-01T00:00:00.000Z
- Last updated: 2026-11-01T06:29:45.104Z
- Canonical: https://polylog.news/crypto/trends/shielded-pool-inflation-risk
- Publisher: Polylog

## Recent evidence

- [confirms] Privacy chain Iron Fish shuts down after a 2019 nullifier bug let an attacker spend shielded coins repeatedly (2026-11-01): Privacy chain Iron Fish is shutting down after a nullifier bug dating to 2019 let an attacker spend shielded coins repeatedly. Crypto Times reports 2.98 billion wrapped IRON were minted on Base. Hidden amounts let a coin-creation bug go unnoticed for years and then end the chain, which is the thesis's core mechanism.