{"id":"CVE-2026-4600","aliases":["GHSA-wvqx-v3f6-w8rh"],"url":"https://o3.security/vulnerability/CVE-2026-4600","summary":"jsrsasign: DSA signatures or X.509 certificates can be forged via DSA domain-parameter validation in KJUR.crypto.DSA.setPublic","details":"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.","published":"2026-03-23T05:00:08.475Z","modified":"2026-09-12T03:30:54.371504506Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"jsrsasign","fixedVersion":"11.1.1"}],"fix":{"url":"https://github.com/kjur/jsrsasign/commit/37b4c06b145c7bfd6bc2a6df5d0a12c56b15ef60","label":"kjur/jsrsasign@37b4c06"},"references":[{"type":"WEB","url":"https://gist.github.com/Kr0emer/bf15ddc097176e951659a24a8e9002a7"},{"type":"WEB","url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-4600.json"},{"type":"WEB","url":"https://security.snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-15812268"},{"type":"WEB","url":"https://security.snyk.io/vuln/SNYK-JS-JSRSASIGN-15370940"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:19375"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:19409"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:19410"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:6568"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:6720"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:6912"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:6926"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2026-4600"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/4xxx/CVE-2026-4600.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4600"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2450208"},{"type":"FIX","url":"https://github.com/kjur/jsrsasign/commit/37b4c06b145c7bfd6bc2a6df5d0a12c56b15ef60"},{"type":"FIX","url":"https://github.com/kjur/jsrsasign/pull/646"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-12T03:30:54.371504506Z"}}