{"id":"CVE-2026-4601","title":"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","summary":"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…","severity":"high","cvss":8.7,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N","cwe":["CWE-325"],"vendor":"kjur","product":"jsrsasign","affected":["jsrsasign < 11.1.1"],"patched":["jsrsasign 11.1.1"],"published":"2026-03-23","updated":"2026-09-10","sourceUpdated":"2026-09-10T13:20:22.510","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-4601","references":[{"url":"https://gist.github.com/Kr0emer/93789fe6efe5519db9692d4ad1dad586","label":"report@snyk.io"},{"url":"https://github.com/kjur/jsrsasign/commit/0710e392ec35de697ce11e4219c988ba2b5fe0eb","label":"report@snyk.io"},{"url":"https://github.com/kjur/jsrsasign/pull/645","label":"report@snyk.io"},{"url":"https://security.snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-15812269","label":"report@snyk.io"},{"url":"https://security.snyk.io/vuln/SNYK-JS-JSRSASIGN-15370941","label":"report@snyk.io"},{"url":"https://access.redhat.com/errata/RHSA-2026:19375","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:19409","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:19410","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:6568","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:6720","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:6912","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:6926","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/security/cve/CVE-2026-4601","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2450209","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-4601.json","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-4601"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4601"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-03-23T14:41:01.570897Z"},"epss":0.003,"epssPercentile":0.22836,"ingestedAt":"2026-07-01T15:50:58.737Z","slug":"CVE-2026-4601","body":"## Overview\n\nVersions 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.\n\n## Affected\n\n- `jsrsasign < 11.1.1`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `jsrsasign 11.1.1`\n\n## Vendor advisories\n\n- **RHSA-2026:19409** · Red Hat · fixed in: Migration Toolkit for Virtualization 2.1 · released 2026-05-19 · [advisory](https://access.redhat.com/errata/RHSA-2026:19409)\n- **RHSA-2026:19410** · Red Hat · fixed in: Migration Toolkit for Virtualization 2.9 · released 2026-05-19 · [advisory](https://access.redhat.com/errata/RHSA-2026:19410)\n- **RHSA-2026:6912** · Red Hat · fixed in: Red Hat Quay 3.10 · released 2026-04-07 · [advisory](https://access.redhat.com/errata/RHSA-2026:6912)\n- **RHSA-2026:6720** · Red Hat · fixed in: Red Hat Quay 3.12 · released 2026-04-06 · [advisory](https://access.redhat.com/errata/RHSA-2026:6720)\n- **RHSA-2026:6568** · Red Hat · fixed in: Red Hat Quay 3.15 · released 2026-04-03 · [advisory](https://access.redhat.com/errata/RHSA-2026:6568)\n- **RHSA-2026:19375** · Red Hat · fixed in: Red Hat Quay 3.16 · released 2026-05-19 · [advisory](https://access.redhat.com/errata/RHSA-2026:19375)\n- **RHSA-2026:6926** · Red Hat · fixed in: Red Hat Quay 3.9 · released 2026-04-07 · [advisory](https://access.redhat.com/errata/RHSA-2026:6926)","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":47.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}