CVE-2026-4258
Gravedad CVSS v4.0:
ALTA
Tipo:
No Disponible / Otro tipo
Fecha de publicación:
17/03/2026
Última modificación:
17/03/2026
Descripción
*** Pendiente de traducción *** All versions of the package sjcl are vulnerable to Improper Verification of Cryptographic Signature due to missing point-on-curve validation in sjcl.ecc.basicKey.publicKey(). An attacker can recover a victim's ECDH private key by sending crafted off-curve public keys and observing ECDH outputs. The dhJavaEc() function directly returns the raw x-coordinate of the scalar multiplication result (no hashing), providing a plaintext oracle without requiring any decryption feedback.
Impacto
Puntuación base 4.0
7.70
Gravedad 4.0
ALTA
Puntuación base 3.x
7.50
Gravedad 3.x
ALTA
Referencias a soluciones, herramientas e información
- https://gist.github.com/Kr0emer/2560f98edb10b0b34f2438cd63913c47
- https://github.com/bitwiseshiftleft/sjcl/blob/master/core/ecc.js%23L454-L461
- https://github.com/bitwiseshiftleft/sjcl/commit/ee307459972442a17beebc29dc331fffd8aff796
- https://security.snyk.io/vuln/SNYK-JS-SJCL-15369617
- https://gist.github.com/Kr0emer/2560f98edb10b0b34f2438cd63913c47
- https://security.snyk.io/vuln/SNYK-JS-SJCL-15369617



