CVE-2026-55174 (GCVE-0-2026-55174)
Vulnerability from cvelistv5
Published
2026-09-30 15:49
Modified
2026-09-30 19:52
Severity ?
5.9 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
CWE
  • CWE-345 - Insufficient Verification of Data Authenticity
  • CWE-347 - Improper Verification of Cryptographic Signature
Summary
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.
References
Impacted products
Vendor Product Version
shrec UltrafastSecp256k1 Version: < 4.2.0
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