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    CVE-2026-4598

    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)).

    Published:Mar 23, 2026
    Last Modified:Jun 25, 2026
    EPS:Mar 23, 2026
    EPSS Score:0.004
    CVSS Score:7.5

    Affected Products

    Vendor
    Jsrsasign Project
    Product
    Jsrsasign
    Vendor
    Kjur
    Product
    Jsrsasign

    Exploits

    https://gist.github.com/Kr0emer/a1bf5cd4547cc630d2dcc5e761de8264

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-4603 (CVSS 2) — Versions of the package jsrsasign before 11.1.1 are vulnerable to Division by zero due to the RSASetPublic/KEY…
    CVE-2026-4601 (CVSS 8.8) — Versions of the package jsrsasign before 11.1.1 are vulnerable to Missing Cryptographic Step via the KJUR.cryp…
    CVE-2026-4599 (CVSS 9.3) — Versions of the package jsrsasign from 7.0.0 and before 11.1.1 are vulnerable to Incomplete Comparison with Mi…
    CVE-2026-4602 (CVSS 7.7) — Versions of the package jsrsasign before 11.1.1 are vulnerable to Incorrect Conversion between Numeric Types d…
    CVE-2026-4600 (CVSS 8.1) — Versions of the package jsrsasign before 11.1.1 are vulnerable to Improper Verification of Cryptographic Signa…
    CVE-2024-21484 (CVSS 7.5) — Versions of the package jsrsasign before 11.0.0 are vulnerable to Observable Discrepancy via the RSA PKCS1.5 o…
    CVE-2022-25898 (CVSS 7.7) — The package jsrsasign before 10.5.25 are vulnerable to Improper Verification of Cryptographic Signature when J…
    CVE-2021-30246 (CVSS 9.1) — In the jsrsasign package through 10.1.13 for Node.js, some invalid RSA PKCS#1 v1.5 signatures are mistakenly r…
    CVE-2020-14966 (CVSS 7.5) — An issue was discovered in the jsrsasign package through 8.0.18 for Node.js. It allows a malleability in ECDSA…
    CVE-2020-14968 (CVSS 9.8) — An issue was discovered in the jsrsasign package before 8.0.17 for Node.js. Its RSASSA-PSS (RSA-PSS) implement…

    References

    https://gist.github.com/Kr0emer/a1bf5cd4547cc630d2dcc5e761de8264
    https://github.com/kjur/jsrsasign/commit/ca5b027240287a1e71fe63019fc4400332594323
    https://github.com/kjur/jsrsasign/pull/648
    https://security.snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-15812263
    https://security.snyk.io/vuln/SNYK-JS-JSRSASIGN-15370938
    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

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High