In the jsrsasign package through 10.1.13 for Node.js, some invalid RSA PKCS#1 v1.5 signatures are mistakenly recognized to be valid. NOTE: there is no known practical attack.
https://kjur.github.io/jsrsasign/
https://github.com/kjur/jsrsasign/releases/tag/10.1.13
https://github.com/kjur/jsrsasign/issues/478
Source: Mitre, NVD
Published: 2021-04-07
Updated: 2026-06-22
Base Score: 6.4
Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:N
Severity: Medium
Base Score: 9.1
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Severity: Critical
EPSS: 0.0017