CVE-2020-14966: Kjur Jsrsasign
High severity, CVSS 7.5. EPSS: 1.1% chance of exploitation in the next 30 days.
An issue was discovered in the jsrsasign package through 8.0.18 for Node.js. It allows a malleability in ECDSA signatures by not checking overflows in the length of a sequence and '0' characters appended or prepended to an integer. The modified signatures are verified as valid. This could have a security-relevant impact if an application relied on a single canonical signature.
Affected products
Published 2020-06-22. Last modified 2026-06-22.