Description
Versions of the package jsrsasign before 11.1.1 are vulnerable to Missing Cryptographic Step via the KJUR.crypto.DSA.signWithMessageHash process in the DSA signing implementation. An attacker can recover the private key by forcing r or s to be zero, so the library emits an invalid signature without retrying, and then solves for x from the resulting signature.
Scores
CVSS v3
8.7
EPSS
0.0002
EPSS Percentile
4.1%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
total
Details
CWE
CWE-325
Status
published
Products (3)
jsrsasign_project/jsrsasign
< 11.1.1
n/a/jsrsasign
< 11.1.1
npm/jsrsasign
0 - 11.1.1npm
Published
Mar 23, 2026
Tracked Since
Mar 23, 2026