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.
| Package (Ecosystem) | Introduced | Fixed | Limit |
|---|---|---|---|
| jsrsasign(npm) | 4.0.0 | 8.0.19 | N/A |
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