CVE-2026-4603 (GCVE-0-2026-4603)
Vulnerability from cvelistv5 – Published: 2026-03-23 05:00 – Updated: 2026-03-23 14:42
VLAI
EPSS
VEX
Summary
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.
Severity
5.9 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-23 14:42 UTC
CWE
- CWE-369 - Division by zero
Assigner
References
Impacted products
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