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Zodiac Reveals ERC-1271 Signature Verification Flaw

Zodiac Reveals ERC-1271 Signature Verification Flaw

First seen 20 Jun 2026, 07:22 UTC • •
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ThreatCluster AI
ThreatCluster •June 21, 2026 at 07:17 UTC
  • •Zodiac disclosed a critical flaw in ERC-1271 signature verification logic.
  • •The vulnerability allows failed verifications to be misrepresented as valid signatures.
  • •No specific CVEs have been reported, but security teams should assess their systems.

On June 20, 2026, the Zodiac team disclosed a security flaw in the ERC-1271 transaction signature verification logic. The vulnerability allows the system to determine signature validity based solely on a returned 'magic value' without confirming the success of the call itself. This oversight can lead to failed verifications being misrepresented as valid signatures, effectively bypassing the module's authentication mechanism. The flaw affects the Zodiac Roles Modifier, potentially exposing users to unauthorized access. No specific CVEs have been reported in the articles, and the current status of the vulnerability remains unclear. Security teams are advised to review their implementations of ERC-1271 to mitigate any risks associated with this flaw.

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Updated 92d ago How this analysis works

Timeline

2026-06-20
Zodiac discloses security flaw
The Zodiac team released an analysis report detailing a flaw in the ERC-1271 verification logic, affecting the Zodiac Roles Modifier.
Kucoin
2026-06-20
Security incident report published
ChainCatcher reported on the Zodiac team's findings, highlighting the flaw's potential for bypassing authentication mechanisms.
Bitget
2026-06-20
Impact assessment shared
Weex reported on the implications of the ERC-1271 flaw, emphasizing the risk of unauthorized access due to signature verification failures.
Weex

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