In the Elliptic package 6.5.6 for Node.js, ECDSA signature malleability occurs because there is a missing check for whether the leading bit of r and s is zero.
[
{
"cpes": [
"cpe:2.3:a:elliptic_project:elliptic:6.5.6:*:*:*:*:node.js:*:*"
],
"vendor": "elliptic_project",
"product": "elliptic",
"versions": [
{
"status": "affected",
"version": "6.5.6"
}
],
"defaultStatus": "unknown"
}
]