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CVE-2026-4598highCWE-1287CWE-835

CVE-2026-4598

21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 8.7epss 0.5%
exploitation probability
0.5%top 55% of all CVEs
observed exploitation
nono source reports it
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)).
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
Affected products
n/a · jsrsasignn/a · org.webjars.npm:jsrsasign
References
https://access.redhat.com/errata/RHSA-2026:19375https://access.redhat.com/errata/RHSA-2026:19409https://access.redhat.com/errata/RHSA-2026:19410https://access.redhat.com/errata/RHSA-2026:22840https://access.redhat.com/errata/RHSA-2026:23361https://access.redhat.com/errata/RHSA-2026:6568https://access.redhat.com/errata/RHSA-2026:6720https://access.redhat.com/security/cve/CVE-2026-4598https://bugzilla.redhat.com/show_bug.cgi?id=2450210https://gist.github.com/Kr0emer/a1bf5cd4547cc630d2dcc5e761de8264https://github.com/kjur/jsrsasign/commit/ca5b027240287a1e71fe63019fc4400332594323https://github.com/kjur/jsrsasign/pull/648