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 rec…
High CVSS 8.7
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 to be zero, so the library emits an invalid signature without retrying, and then solves for x from the resulting signature.
In-depth triage · Auto channel
No in-depth report has been generated yet (DR-003 v2 AI pipeline is under construction).
Affected products
- :
Sources
- NVD DATABASE
Original Links
- https://gist.github.com/Kr0emer/93789fe6efe5519db9692d4ad1dad586 Exploit
- https://github.com/kjur/jsrsasign/commit/0710e392ec35de697ce11e4219c988ba2b5fe0eb Patch
- https://github.com/kjur/jsrsasign/pull/645 Issue Tracking
- https://security.snyk.io/vuln/SNYK-JS-JSRSASIGN-15370941 Third Party Advisory
- 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-2026-4601
- https://bugzilla.redhat.com/show_bug.cgi?id=2450209
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-4601.json
- https://security.snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-15812269
Timeline
- nvd_ingest NVD