What is CVE-2026-4598?

CVE-2026-4598 is a high-severity vulnerability in Jsrsasign, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 7.5/10. Published 2026-03-23.

How severe is CVE-2026-4598?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Jsrsasign

CVE-2026-4598

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…

EPSS: 0.001 (23.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P.

Affected products

N/a Jsrsasign — versions 0

Weakness classification (CWE)

CWE-835 — Loop with Unreachable Exit Condition (Infinite Loop)

References

security.snyk.io/vuln/SNYK-JS-JSRSASIGN-15370938
gist.github.com/Kr0emer/a1bf5cd4547cc630d2dcc5e761de8264
github.com/kjur/jsrsasign/pull/648
github.com/kjur/jsrsasign/commit/ca5b027240287a1e71fe63019fc4400332594323

Frequently asked questions

What is CVE-2026-4598?: CVE-2026-4598 is a high-severity vulnerability in Jsrsasign, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 7.5/10. Published 2026-03-23.
How severe is CVE-2026-4598?: High severity. CVSS v3 base score is 7.5 out of 10.