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CVE-2026-4598

High

Description

Versions of the package jsrsasign before 11.1.1 are vulnerable to Infinite loop via the bnModInverse function in ext/jsbn2.js when the BigInteger.modInverse implementation receives zero or negative inputs, allowing an attacker to hang the process permanently by supplying such crafted values (e.g., modInverse(0, m) or modInverse(-1, m)).

SeverityHigh
CVSS7.5
Exploit probability—
ProductKjur Jsrsasign
PublishedMar 23, 2026
First seenMar 23, 2026
Weakness typeCWE-835CWE-835

How to fix

Update
  • kjur jsrsasign11.1.1 or later
  • jsrsasign11.1.1 or later
Vendor advisories

Affected products

ProductAffected versionsFixed in
kjur jsrsasignv < 11.1.111.1.1
jsrsasignnpmv < 11.1.111.1.1

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