RUSTSEC-2026-0240 Ed25519 identity public keys permit universal signature forgery

All published versions of dcrypt-sign before 2.0.0 accepted the Edwards identity as an Ed25519 public key. A signature with R = B and S = 1 then verified for every message because the challenge term multiplied the identity. The implementation also admitted other noncanonical or small-order inputs...

Ed25519 identity public keys permit universal signature forgery

All published versions of dcrypt-sign before 2.0.0 accepted the Edwards identity as an Ed25519 public key. A signature with R = B and S = 1 then verified for every message because the challenge term multiplied the identity. The implementation also admitted other noncanonical or small-order inputs...

PT-2026-76520

All published versions of dcrypt-sign before 2.0.0 accepted the Edwards identity as an Ed25519 public key. A signature with R = B and S = 1 then verified for every message because the challenge term multiplied the identity. The implementation also admitted other noncanonical or small-order inputs...