AIKIDO-2026-11064
mppx is vulnerable to Authentication Bypass via Signature Replay
70
High Risk
This Affects:
mppxTL;DR
Tempo proof signatures (EIP-712) were not bound to the challenge realm, allowing proofs/signatures to be potentially reused or validated in unintended contexts (cross-realm replay/misuse). The patch updates the proof message/typed-data schema and signature verification to include realm, and fixes credential challenge.opaque serialization to ensure verification inputs match the intended spec format.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range.
Background info
mppx is vulnerable to Authentication Bypass via Signature Replay in versions 0.5.0 - 0.6.4.
How to fix this
Upgrade the mppx library to the patch version.
Are You Affected?
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SOC 2Compliant
ISO 27001Compliant