CVE-2026-4601: fallo crítico en jsrsasign
Publicada el · Actualizada el
28Vexday Risk Score
Sin señal de explotación. Ningún artefacto público de explotación conocido hasta ahora.
ssvc Trackcvss 9.4epss 0.5%
probabilidad de explotación
0.5%top 62% de las CVE
explotación observada
noninguna fuente lo reporta
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.
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
Referencias
https://access.redhat.com/errata/RHSA-2026:19375https://access.redhat.com/errata/RHSA-2026:19409https://access.redhat.com/errata/RHSA-2026:19410https://access.redhat.com/errata/RHSA-2026:6568https://access.redhat.com/errata/RHSA-2026:6720https://access.redhat.com/errata/RHSA-2026:6912https://access.redhat.com/errata/RHSA-2026:6926https://access.redhat.com/security/cve/CVE-2026-4601https://bugzilla.redhat.com/show_bug.cgi?id=2450209https://gist.github.com/Kr0emer/93789fe6efe5519db9692d4ad1dad586https://github.com/kjur/jsrsasign/commit/0710e392ec35de697ce11e4219c988ba2b5fe0ebhttps://github.com/kjur/jsrsasign/pull/645