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0xCERT Security Advisory 0xCERT-2026-0145
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Advisory-ID:  0xCERT-2026-0145
Severity:     High
Published:    2026-09-24T00:00:00.000Z
Updated:      2026-10-08T22:48:58.443Z
Chains:       Ethereum
URL:          https://www.0xcert.com/advisory/0xCERT-2026-0145

Title: Payy Network exploit — $1.8M lost on Ethereum

Summary
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Payy Network lost an estimated $1.8M on Ethereum (bridge logic flaw), according to the DeFiLlama hacks database. Users and integrators should review exposure and follow the project's official channels.

Details
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Summary
Payy Network lost an estimated $1.8M on Ethereum (bridge logic flaw), according to the DeFiLlama hacks database. Users and integrators should review exposure and follow the project's official channels.

Incident
- - Protocol: Payy Network
- - Date (UTC): 2026-09-24
- - Estimated loss: $1.8M
- - Chain(s): Ethereum
- - Technique: Bridge Logic Flaw
- - Classification: Bridge & Cross-Chain
- - Target: DeFi Protocol
- - Bridge incident: yes

Recommended actions
- - Revoke token approvals granted to Payy Network contracts until the project confirms they are safe
- - Integrators: pause or delist affected assets and monitor for attacker fund movements
- - Beware of follow-on phishing: ignore unofficial "refund", "recovery", or "claim" links and DMs; use the project's verified channels only

Source & attribution
This 0xCERT advisory relays an incident recorded in the DeFiLlama hacks database (https://defillama.com/hacks). Figures are preliminary estimates and may be revised; refer to the project's own post-mortem for the authoritative record. Report additional details to 0xCERT at https://www.0xcert.com/report.

References
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- - https://defillama.com/hacks
- - https://www.blockchainbreaches.com/en/breaches/payy-network-2026

Verify with the 0xCERT OpenPGP key: https://www.0xcert.com/pgp.asc
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