CVE-2025-14505 - Elliptic Cryptanalysis vulnerability when `k` has leading zeros

CVE-2025-14505 - Elliptic Cryptanalysis vulnerability when `k` has leading zeros

https://cvefeed.io/rssfeed/latest.atom / Fri, 01/09/2026 - 01:56
CVE ID : CVE-2025-14505
Published : Jan. 8, 2026, 9:15 p.m. | 3 hours, 14 minutes ago
Description : The ECDSA implementation of the Elliptic package generates incorrect signatures if an interim value of 'k' (as computed based on step 3.2 of RFC 6979 https://datatracker.ietf.org/doc/html/rfc6979 ) has leading zeros and is susceptible to cryptanalysis, which can lead to secret key exposure. This happens, because the byte-length of 'k' is incorrectly computed, resulting in its getting truncated during the computation. Legitimate transactions or communications will be broken as a result. Furthermore, due to the nature of the fault, attackers could–under certain conditions–derive the secret key, if they could get their hands on both a faulty signature generated by a vulnerable version of Elliptic and a correct signature for the same inputs. This issue affects all known versions of Elliptic (at the time of writing, versions less than or equal to 6.6.1).
Severity: 5.6 | MEDIUM
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