{"id":"CVE-2026-4601","aliases":["EUVD-2026-14377","GHSA-w8q8-93cx-6h7r"],"status":"published","title":"jsrsasign: Missing cryptographic validation during DSA signing enables private key extraction","description":"Versions of the package jsrsasign before 11.1.1 are vulnerable to Missing Cryptographic Step via the KJUR.crypto.DSA.signWithMessageHash process in the DSA signing implementation. An attacker can recover the private key by forcing r or s to be zero, so the library emits an invalid signature without retrying, and then solves for x from the resulting signature.","severity":{"version":"4.0","score":9.4,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:H/SA:N/E:P","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00312,"percentile":0.24279,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-325"],"published":"2026-03-23T05:00:13Z","modified":"2026-10-28T02:30:45Z","fixes":[{"ecosystem":"npm","package":"jsrsasign","fixed_in":["11.1.1"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"jsrsasign","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"11.1.1"}]}]},{"source":"osv","ecosystem":"npm","package":"jsrsasign","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"11.1.1"}]}]}],"products":[{"vendor":"kjur","product":"jsrsasign"},{"vendor":"red hat","product":"migration toolkit for virtualization 2.1"},{"vendor":"red hat","product":"migration toolkit for virtualization 2.9"},{"vendor":"red hat","product":"red hat quay 3.10"},{"vendor":"red hat","product":"red hat quay 3.12"},{"vendor":"red hat","product":"red hat quay 3.15"},{"vendor":"red hat","product":"red hat quay 3.16"},{"vendor":"red hat","product":"red hat quay 3.9"}],"references":[{"url":"https://security.snyk.io/vuln/SNYK-JS-JSRSASIGN-15370941","tags":["Third Party Advisory","web"]},{"url":"https://security.snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-15812269","tags":["web"]},{"url":"https://gist.github.com/Kr0emer/93789fe6efe5519db9692d4ad1dad586","tags":["Exploit","Mitigation","Third Party Advisory","web"]},{"url":"https://github.com/kjur/jsrsasign/pull/645","tags":["Issue Tracking","fix","web"]},{"url":"https://github.com/kjur/jsrsasign/commit/0710e392ec35de697ce11e4219c988ba2b5fe0eb","tags":["Patch","fix","web"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-4601","tags":["vdb-entry","x_refsource_REDHAT","advisory"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2450209","tags":["issue-tracking","x_refsource_REDHAT","report"]},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-4601.json","tags":["x_sadp-csaf-vex","web"]},{"url":"https://access.redhat.com/errata/RHSA-2026:19409","tags":["vendor-advisory","x_refsource_REDHAT","advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:19410","tags":["vendor-advisory","x_refsource_REDHAT","advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:6912","tags":["vendor-advisory","x_refsource_REDHAT","advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:6720","tags":["vendor-advisory","x_refsource_REDHAT","advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:6568","tags":["vendor-advisory","x_refsource_REDHAT","advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:19375","tags":["vendor-advisory","x_refsource_REDHAT","advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:6926","tags":["vendor-advisory","x_refsource_REDHAT","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4601","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-w8q8-93cx-6h7r"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/4xxx/CVE-2026-4601.json","tags":["advisory"]},{"url":"https://github.com/kjur/jsrsasign","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-4601","description":"Versions of the package jsrsasign before 11.1.1 are vulnerable to Missing Cryptographic Step via the KJUR.crypto.DSA.signWithMessageHash process in the DSA signing implementation. An attacker can recover the private key by forcing r or s to be zero, so the library emits an invalid signature without retrying, and then solves for x from the resulting signature.","status":"published","published":"2026-03-23T05:00:13.312Z","modified":"2026-09-10T12:04:55.182Z","cvss":[{"version":"4.0","score":9.4,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:H/SA:N/E:P","level":"critical","assessor":"cna"},{"version":"3.1","score":8.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N/E:P","level":"high","assessor":"cna"},{"version":"3.1","score":8.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N","level":"high","assessor":"adp"}],"cwes":["CWE-325","CWE-325"],"updated_at":"2026-11-02T14:19:59.369956Z"}],"euvd":[{"id":"EUVD-2026-14377","description":"Versions of the package jsrsasign before 11.1.1 are vulnerable to Missing Cryptographic Step via the KJUR.crypto.DSA.signWithMessageHash process in the DSA signing implementation. An attacker can recover the private key by forcing r or s to be zero, so the library emits an invalid signature without retrying, and then solves for x from the resulting signature.","status":"published","published":"2026-03-23T05:00:13Z","modified":"2026-09-10T12:04:55Z","cvss":[{"version":"4.0","score":9.4,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:H/SA:N/E:P","level":"critical"}],"updated_at":"2026-11-02T17:28:25.275283Z"}],"ghsa":[{"id":"GHSA-w8q8-93cx-6h7r","title":"jsrsasign: Missing cryptographic validation during DSA signing enables private key extraction","description":"Versions of the package jsrsasign before 11.1.1 are vulnerable to Missing Cryptographic Step via the KJUR.crypto.DSA.signWithMessageHash process in the DSA signing implementation. An attacker can recover the private key by forcing r or s to be zero, so the library emits an invalid signature without retrying, and then solves for x from the resulting signature.","status":"published","published":"2026-03-23T06:30:29Z","modified":"2026-03-29T15:52:00Z","cvss":[{"version":"4.0","score":8.8,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:H/SA:N/E:P","level":"high"},{"version":"3.1","score":8.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N","level":"high"}],"cwes":["CWE-325"],"updated_at":"2026-11-02T14:39:44.97342Z"}],"nvd":[{"id":"CVE-2026-4601","description":"Versions of the package jsrsasign before 11.1.1 are vulnerable to Missing Cryptographic Step via the KJUR.crypto.DSA.signWithMessageHash process in the DSA signing implementation. An attacker can recover the private key by forcing r or s to be zero, so the library emits an invalid signature without retrying, and then solves for x from the resulting signature.","status":"published","published":"2026-03-23T06:16:21.893Z","modified":"2026-09-10T13:20:22.51Z","cvss":[{"version":"4.0","score":8.8,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:H/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"},{"version":"3.1","score":8.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N","level":"high","assessor":"secondary"},{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"critical","assessor":"primary"},{"version":"3.1","score":8.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N","level":"high","assessor":"secondary"}],"cwes":["CWE-325"],"updated_at":"2026-11-02T14:12:10.568062Z"}],"osv":[{"id":"CVE-2026-4601","description":"Versions of the package jsrsasign before 11.1.1 are vulnerable to Missing Cryptographic Step via the KJUR.crypto.DSA.signWithMessageHash process in the DSA signing implementation. An attacker can recover the private key by forcing r or s to be zero, so the library emits an invalid signature without retrying, and then solves for x from the resulting signature.","status":"published","published":"2026-03-23T05:00:13.312Z","modified":"2026-10-28T02:30:45.398950788Z","cvss":[{"version":"4.0","score":8.8,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:H/SA:N/E:P","level":"high"}],"cwes":["CWE-325"],"updated_at":"2026-11-02T15:45:05.870292Z"},{"id":"GHSA-w8q8-93cx-6h7r","title":"jsrsasign: Missing cryptographic validation during DSA signing enables private key extraction","description":"Versions of the package jsrsasign before 11.1.1 are vulnerable to Missing Cryptographic Step via the KJUR.crypto.DSA.signWithMessageHash process in the DSA signing implementation. An attacker can recover the private key by forcing r or s to be zero, so the library emits an invalid signature without retrying, and then solves for x from the resulting signature.","status":"published","published":"2026-03-23T06:30:29Z","modified":"2026-03-29T16:11:30.182175Z","cvss":[{"version":"3.1","score":8.7,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N","level":"high"},{"version":"4.0","score":8.8,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:H/SA:N/E:P","level":"high"}],"cwes":["CWE-325"],"updated_at":"2026-11-02T15:46:58.401149Z"}]}}