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)).

References

https://security.snyk.io/vuln/SNYK-JS-JSRSASIGN-15370938

https://github.com/kjur/jsrsasign/pull/648

https://github.com/kjur/jsrsasign/commit/ca5b027240287a1e71fe63019fc4400332594323

https://gist.github.com/Kr0emer/a1bf5cd4547cc630d2dcc5e761de8264

Details

Source: Mitre, NVD

Published: 2026-03-23

Updated: 2026-03-23

Risk Information

CVSS v2

Base Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

Severity: High

CVSS v3

Base Score: 7.5

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Severity: High

CVSS v4

Base Score: 8.7

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Severity: High

EPSS

EPSS: 0.00042