CVE-2026-4601
HIGHDescription
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.
How to fix
TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works
Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.
CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N
Exploit Intelligence
Low risk: more likely to be exploited than 38% of all known CVEs.
References
Related Vulnerabilities
Other CWE-325 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2021-22946 | High | 7.5 | 4.5% | - | Fix |
| CVE-2020-15086 | Critical | 9.8 | 3.6% | - | Fix |
| CVE-2021-33560 | High | 7.5 | 2.3% | - | Fix |
| CVE-2020-15098 | High | 8.8 | 2.2% | - | Fix |
| CVE-2019-3738 | Medium | 6.5 | 1.7% | - | Fix |
| CVE-2016-9574 | Medium | 5.9 | 1.4% | - | Fix |
Common questions
How do I fix CVE-2026-4601?
Upgrade jsrsasign to 11.1.1 or later.
Is CVE-2026-4601 being actively exploited?
Not that we know of. CVE-2026-4601 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.47% is the estimated probability that it will be exploited in the next 30 days. That is higher than 38% of all scored CVEs.
How severe is CVE-2026-4601?
CVE-2026-4601 has a CVSS v3 base score of 8.7, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
What does CVE-2026-4601 affect?
Published advisories record a fix for jsrsasign (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.
Embed a live status badge for CVE-2026-4601
Markdown
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-09-10.