7.4High
CVE-2026-4600
Description
Versions of the package jsrsasign before 11.1.1 are vulnerable to Improper Verification of Cryptographic Signature via the DSA domain-parameter validation in KJUR.crypto.DSA.setPublic (and the related DSA/X509 verification flow in src/dsa-2.0.js). An attacker can forge DSA signatures or X.509 certificates that X509.verifySignature() accepts by supplying malicious domain parameters such as g=1, y=1, and a fixed r=1, which make the verification equation true for any hash.
Weakness (CWE):
CWE-347
Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.
Affected products and versions
| Vendor | Product | Versions | |
|---|---|---|---|
| kjur | jsrsasign | < 11.1.1 | |
| migration toolkit virtualization | 2.10 | — | |
| migration toolkit virtualization | 2.9 | — | |
| quay | 3.10 | — | |
| quay | 3.12 | — | |
| quay | 3.15 | — | |
| quay | 3.16 | — | |
| quay | 3.9 | — | |
| Red Hat | Migration Toolkit for Virtualization 2.1 | all versions | |
| Red Hat | Migration Toolkit for Virtualization 2.9 | all versions | |
| Red Hat | Red Hat Quay 3.10 | all versions | |
| Red Hat | Red Hat Quay 3.12 | all versions | |
| Red Hat | Red Hat Quay 3.15 | all versions | |
| Red Hat | Red Hat Quay 3.16 | all versions | |
| Red Hat | Red Hat Quay 3.9 | all versions | |
| — | jsrsasign | < 11.1.1 | |
| — | org.webjars.npm:jsrsasign | 0 |
References and patches
- https://security.snyk.io/vuln/SNYK-JS-JSRSASIGN-15370940 Third Party Advisory
- https://security.snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-15812268
- https://gist.github.com/Kr0emer/bf15ddc097176e951659a24a8e9002a7 ExploitMitigationThird Party Advisory
- https://github.com/kjur/jsrsasign/pull/646 Issue Tracking
- https://github.com/kjur/jsrsasign/commit/37b4c06b145c7bfd6bc2a6df5d0a12c56b15ef60 Patch
- 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-2026:6568
- https://access.redhat.com/errata/RHSA-2026:6720
- https://access.redhat.com/errata/RHSA-2026:6912
- https://access.redhat.com/errata/RHSA-2026:6926
- https://access.redhat.com/security/cve/CVE-2026-4600
- https://bugzilla.redhat.com/show_bug.cgi?id=2450208
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-4600.json
CPE matches (NVD) (1)
cpe:2.3:a:kjur:jsrsasign:*:*:*:*:*:node.js:*:*< 11.1.1