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CVE-2026-4258

HIGH

7.5

Descricao

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.

Detalhes CVE

Pontuacao CVSS v3.17.5

SeveridadeHIGH

Vetor CVSSCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Vetor de ataqueNETWORK

ComplexidadeLOW

Privilegios necessariosNONE

Interacao do usuarioNONE

Publicado3/17/2026

Ultima modificacao3/17/2026

Fontenvd

Avistamentos honeypot0

Fraquezas (CWE)

CWE-347CWE-325

Referencias

https://gist.github.com/Kr0emer/2560f98edb10b0b34f2438cd63913c47(report@snyk.io)

https://github.com/bitwiseshiftleft/sjcl/blob/master/core/ecc.js%23L454-L461(report@snyk.io)

https://github.com/bitwiseshiftleft/sjcl/commit/ee307459972442a17beebc29dc331fffd8aff796(report@snyk.io)

https://security.snyk.io/vuln/SNYK-JS-SJCL-15369617(report@snyk.io)

https://gist.github.com/Kr0emer/2560f98edb10b0b34f2438cd63913c47(134c704f-9b21-4f2e-91b3-4a467353bcc0)

https://security.snyk.io/vuln/SNYK-JS-SJCL-15369617(134c704f-9b21-4f2e-91b3-4a467353bcc0)

Correlacoes IOC

Sem correlacoes registradas

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