# Security Roundup: Bridge and Mint Exploits Drive a Heavy Run of June Losses

Syscoin's bridge bled an estimated $10 million through a proof-validation flaw, while TesseraDAO lost about $2.5 million to an unauthorized token mint.

- Published: 2026-06-15T05:40:42.058Z
- Canonical: https://polylog.news/crypto/2026-06-15/security-roundup-bridge-and-mint-exploits-drive-a-heavy-run
- Publisher: Polylog (Crypto desk)
- Section: crypto
- Sources: [Rekt News](https://www.rekt.news/), [Polylog editors](https://polylog.news)

Several on-chain incidents tracked by Rekt News underscore a recurring set of failure modes this month. The largest involved the Syscoin bridge, where a parsing error in the relay's proof-validation code let an attacker mint approximately 5…

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