CVE-2026-4600
- State
- Published
- Severity
- 9.1 Critical
- Published
- Mar 23, 2026
- Updated
- Sep 10, 2026
- Reserved
- Mar 22, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 9.1 Critical | CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:P | snyk |
| 3.1 | 7.4 High | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N/E:P | snyk |
| 3.1 | 8.2 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N | redhat-SADP |
Weaknesses
- CWE-347 Improper Verification of Cryptographic Signature
Affected Products
| Product | Versions |
|---|---|
jsrsasignn/a |
|
org.webjars.npm:jsrsasignn/a |
|
References
- https://security.snyk.io/vuln/SNYK-JS-JSRSASIGN-15370940
- https://security.snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-15812268
- https://gist.github.com/Kr0emer/bf15ddc097176e951659a24a8e9002a7
- https://github.com/kjur/jsrsasign/pull/646
- https://github.com/kjur/jsrsasign/commit/37b4c06b145c7bfd6bc2a6df5d0a12c56b15ef60
- https://access.redhat.com/security/cve/CVE-2026-4600vdb-entry
- RHBZ#2450208issue-tracking
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-4600.json
- https://access.redhat.com/errata/RHSA-2026:19409vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:19410vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:6912vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:6720vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:6568vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:19375vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:6926vendor-advisory
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