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CVE-2026-55174

UltrafastSecp256k1: ECDSA adaptor verification accepts non-adaptable pre-signatures due to missing DLEQ binding PUBLISHED

Description (CNA)

UltrafastSecp256k1 is a high-performance, multi-backend secp256k1 engine with reproducible audit evidence, compatibility shims, and profile-based review scopes. Prior to version 4.2.0, UltrafastSecp256k1's ECDSA adaptor pre-signature verification accepts forged adaptor pre-signatures whose "r" value is not cryptographically bound to the adaptor point "T". This issue has been patched in version 4.2.0.

Affected (CNA)

Vendor / productVersions
shrec / UltrafastSecp256k1affected < 4.2.0

CWE

CWE-345, CWE-347

References

ADP enrichment

CISA-ADP

No English description supplied.