CVE-2026-4598
Last modified
CVE-2026-4598 is a high-severity vulnerability rated 7.7/10 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 0.40% 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
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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
Frequently Asked Questions
What is CVE-2026-4598?
How severe is CVE-2026-4598?
How do I fix CVE-2026-4598?
Are you affected by CVE-2026-4598?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST