Is CVE-2026-4601 actively exploited?

No active exploitation of CVE-2026-4601 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-4601 be exploited remotely?

Yes. CVE-2026-4601 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-4601?

CVE-2026-4601 has a CVSS score of 9.1 (CRITICAL).

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CRITICAL

CVE-2026-4601

CWE-325Published: March 23, 2026· Updated: Jul 16, 2026

9.1

CVSS v3.1

EPSS:0.02%probability of exploitation in 30 daysPercentile:4.9th

Official 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.

NVD Source

Risk Analysis

This critical vulnerability in jsrsasign allows an attacker to recover private keys due to a missing cryptographic step in the DSA signing implementation. With a CVSS score of 9.1, this flaw could lead to severe compromise of cryptographic integrity. There is no EPSS score to indicate exploitation likelihood, and it is not in CISA's KEV catalog.

No public exploit is known for this vulnerability, but it is remotely exploitable without authentication. The low attack complexity makes it a significant concern for systems relying on jsrsasign for cryptographic operations.

Recommended Action

Upgrade jsrsasign to version 11.1.1 or later to address this cryptographic flaw. Review and update any applications or systems that utilize this library.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2026-4601 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), with a CVSS base score of 9.1.