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)).
{
"unresolved_ranges": [
{
"extracted_events": [
{
"fixed": "*"
}
],
"source": "AFFECTED_FIELD"
}
],
"cna_assigner": "snyk",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/4xxx/CVE-2026-4598.json",
"cwe_ids": [
"CWE-835"
]
}{
"cpe": "cpe:2.3:a:kjur:jsrsasign:*:*:*:*:*:node.js:*:*",
"source": [
"CPE_RANGE",
"REFERENCES"
],
"extracted_events": [
{
"introduced": "0"
},
{
"fixed": "11.1.1"
}
]
}