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CVE-2026-4603

CVE-2026-4603

This page contains facts from public vulnerability sources. Check the original advisory before updating.

Versions of the package jsrsasign before 11.1.1 are vulnerable to Division by zero due to the RSASetPublic/KEYUTIL parsing path in ext/rsa.js and the BigInteger.modPowInt reduction logic in ext/jsbn.js. An attacker can force RSA public-key operations (e.g., verify and encryption) to collapse to deterministic zero outputs and hide “invalid key” errors by supplying a JWK whose modulus decodes to zero.

CVSS 5.1 · Medium · EPSS 0.1% · Fix available

Published
Updated

Stack: node

Affected products and versions

  • jsrsasign

    Versions
    • ≥ 0, < 11.1.1: Affected (semver)

    Update to 11.1.1

  • jsrsasign npm

    Affected ranges
    • SEMVER: < 11.1.1

    Update to 11.1.1

Original sources

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