CVE-2026-4598Versions 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 i…
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It affects Red Hat Migration Toolkit for Virtualization 2.1 and 2 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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
- 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P
- Weakness (CWE)
- CWE-835, CWE-1287
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- snyk
- NVD analysis
- Modified
- Record last updated
- Sep 10, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Red Hat Migration Toolkit for Virtualization 2.1 redhat:migration_toolkit_virtualization | from 1779139872 not affected | CISA ADP |
Red Hat Red Hat Quay 3.10 redhat:quay | from 1779822261 not affected | CISA ADP |
kjur jsrsasign kjur:jsrsasign | before 11.1.1 | NVD |
References
- https://security.snyk.io/vuln/SNYK-JS-JSRSASIGN-15370938third-party-advisory
- https://security.snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-15812263
- https://gist.github.com/Kr0emer/a1bf5cd4547cc630d2dcc5e761de8264exploit, mitigation, third-party-advisory
- https://github.com/kjur/jsrsasign/pull/648issue-tracking
- https://github.com/kjur/jsrsasign/commit/ca5b027240287a1e71fe63019fc4400332594323patch
- https://access.redhat.com/errata/RHSA-2026:19375
- https://access.redhat.com/errata/RHSA-2026:19409
- https://access.redhat.com/errata/RHSA-2026:19410
- https://access.redhat.com/errata/RHSA-2026:22840
- https://access.redhat.com/errata/RHSA-2026:23361
- https://access.redhat.com/errata/RHSA-2026:6568
- https://access.redhat.com/errata/RHSA-2026:6720
- https://access.redhat.com/security/cve/CVE-2026-4598
- https://bugzilla.redhat.com/show_bug.cgi?id=2450210
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-4598.json
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.