CVE-2026-4600CWE-347

CVE-2026-4600

High · published March 23, 2026

CVSS v3.1
7.4
EPSS
0%
Percentile
25.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.4 · HIGH
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00333 · 25.2th percentile
Weakness
CWE-347 · Improper Verification of Cryptographic Signature
Published
2026-03-23T10:16Z
Affected products (1)
ProductVersionsFixed in
kjur/jsrsasign< 11.1.111.1.1
References (16)
https://gist.github.com/Kr0emer/bf15ddc097176e951659a24a8e9002a7 · [email protected]https://github.com/kjur/jsrsasign/commit/37b4c06b145c7bfd6bc2a6df5d0a12c56b15ef60 · [email protected]https://github.com/kjur/jsrsasign/pull/646 · [email protected]https://security.snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-15812268 · [email protected]https://security.snyk.io/vuln/SNYK-JS-JSRSASIGN-15370940 · [email protected]https://access.redhat.com/errata/RHSA-2026:19375 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:19409 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:19410 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:6568 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:6720 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:6912 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:6926 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/security/cve/CVE-2026-4600 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://bugzilla.redhat.com/show_bug.cgi?id=2450208 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://gist.github.com/Kr0emer/bf15ddc097176e951659a24a8e9002a7 · 134c704f-9b21-4f2e-91b3-4a467353bcc0https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-4600.json · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
EPSS history
Timeline
  • 23 MAR 05:00Z
    Versions of the package jsrsasign before 11.1.1 are vulnerable to Improper Verification of Cryptographic Signature via the DSA domain-parameter validation in…
    cvelistv5