CVE-2026-4598
Last modified
CVE-2026-4598 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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)).. EPSS estimates a 0.55% chance of exploitation in the next 30 days.
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)).
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Kjur | Jsrsasign | < 11.1.1 |
References
- https://gist.github.com/Kr0emer/a1bf5cd4547cc630d2dcc5e761de8264Exploit, Mitigation, Third Party Advisory
- https://github.com/kjur/jsrsasign/pull/648Issue Tracking
- https://security.snyk.io/vuln/SNYK-JS-JSRSASIGN-15370938Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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