Syndicate Labs

Private Key Leakage

Estimated loss

$380.0K

VERDICT —OUT OF SCOPE

Root cause is private-key / signer compromise — the on-chain contract behaved exactly as written. No pre-deployment source audit or bytecode review reaches the key-custody perimeter; this is operational-security territory (HSM/MPC hygiene, key rotation, hot-wallet isolation). Bytecode would show nothing wrong.

▰ METHOD

PRIVATE KEY

PRIVATE-KEY

Root cause

Root-cause analysis not yet published. The incident description below contains all currently available signal — review the attack transaction directly for definitive forensics.

Forensic narrative

Syndicate Labs’ Commons cross-chain bridge was compromised due to a private key leak. The attacker used the leaked upgrade key to maliciously upgrade the bridge contracts, draining approximately 18.5 million SYND tokens (worth ~$330,000) and ~$50,000 in user assets, for a total loss of $380,000. The incident was limited to specific chains, and the project pledged full compensation to affected users. Attack method (per SlowMist): Private Key Leakage. Reported loss: $ 380,000.

Primary source

https://crypto.news/syndicate-labs-suffers-380k-synd-bridge-exploit-pledges-full-user-compensation/ ↗

Sourced from

slowmist

Technical record