Log in Start free

Vulnerability · Published Mar 23, 2026 · Assigned by snyk

CVE-2026-4598

High 7.5

In plain English

A high-severity infinite loop in jsrsasign. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 47% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.6%top 53.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official 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)).

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
npmjsrsasign11.1.1GHSA-8g7p-jf3g-gxcp

Affected products (as reported)

VendorProductVersions
n/a jsrsasign 0 – before 11.1.1
n/a org.webjars.npm:jsrsasign 0 – before *

Weakness: CWE-835, CWE-1287 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P

References