CVE-2026-4601
CVSS Score
8.7
EPSS Score
0.0%
EPSS Percentile
5th
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.
| CWE | CWE-325 |
| Vendor | n/a |
| Product | jsrsasign |
| Published | Mar 23, 2026 |
| Last Updated | Mar 23, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N/E:P Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
None
Affected Versions
n/a / jsrsasign
0 < 11.1.1
References
security.snyk.io: https://security.snyk.io/vuln/SNYK-JS-JSRSASIGN-15370941 gist.github.com: https://gist.github.com/Kr0emer/93789fe6efe5519db9692d4ad1dad586 github.com: https://github.com/kjur/jsrsasign/pull/645 github.com: https://github.com/kjur/jsrsasign/commit/0710e392ec35de697ce11e4219c988ba2b5fe0eb
Credits
Kr0emer