CVE-2026-4603
5.1
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| n/a | jsrsasign | 0 < 11.1.1 | affected |
Weaknesses
- CWE-369: Division by zero
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: no
- Technical Impact: partial
References
- https://security.snyk.io/vuln/SNYK-JS-JSRSASIGN-15371176
- https://gist.github.com/Kr0emer/5366b7364c4fbf7e754bc377f321e9f3
- https://github.com/kjur/jsrsasign/commit/dc41d49fac4297e7a737a3ef8ebd0aa9c49ef93f
- https://github.com/kjur/jsrsasign/pull/649
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