QwikSec

Security Database

CVE

CWE

Training

CVE-2026-4601

Published: Mar 23, 2026

Modified: Mar 23, 2026

PUBLISHED

CVSS v3.1

8.7

HIGH

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.

Vendor	Product	Versions
n/a	jsrsasign	affected `0 - < 11.1.1`

Weaknesses (CWE)

CVSS v3.1 Details

CVSS v3.1 Vector

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

References

https://security.snyk.io/vuln/SNYK-JS-JSRSASIGN-15370941

https://gist.github.com/Kr0emer/93789fe6efe5519db9692d4ad1dad586

https://github.com/kjur/jsrsasign/pull/645

https://github.com/kjur/jsrsasign/commit/0710e392ec35de697ce11e4219c988ba2b5fe0eb

Security Training

Train your team to recognize and prevent security threats with our comprehensive security awareness program.

Vulnerability Scanning

Discover vulnerabilities in your applications and infrastructure before attackers do.