CVE-2026-4601
HIGHCVSS v3.1: 8.7 · EPSS: 0.0022 (12.0 percentile)
Source data as of:
At a glance
- Severity
- HIGH
- CVSS
- 8.7 v3.1 · NVD
- EPSS
- 0.0022 (12.0 percentile) · FIRST.org
- CISA KEV
- No
- Attack conditions (CVSS vector)
- NetworkNo privilegesNo user interaction · Source: NVD Vector
- Affected vendors
- kjur
- Published
- 2026-03-23 · Modified: 2026-06-22
- References
- Jump to references (4)
CVSS / EPSS / KEV
Source — CVSS: NVD · EPSS: FIRST.org · KEV: CISA. Data & Sources
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.
References
Reference URLs as listed by NVD, grouped by a mechanical match on the link's host/pattern. Labels describe the link type only.