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.
History

Mon, 23 Mar 2026 05:45:00 +0000

Type Values Removed Values Added
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.
Weaknesses CWE-325
References
Metrics cvssV3_1

{'score': 8.7, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N/E:P'}

cvssV4_0

{'score': 9.4, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:H/SA:N/E:P'}


cve-icon MITRE

Status: PUBLISHED

Assigner: snyk

Published:

Updated: 2026-03-23T05:00:13.312Z

Reserved: 2026-03-22T16:26:10.973Z

Link: CVE-2026-4601

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-03-23T06:16:21.893

Modified: 2026-03-23T06:16:21.893

Link: CVE-2026-4601

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.