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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-4258 Detail

Description

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

Nist CVSS score does not match with CNA score
CNA:  Snyk
CVSS-BT 7.7 HIGH
Vector:  CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:P

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://gist.github.com/Kr0emer/2560f98edb10b0b34f2438cd63913c47 CISA-ADP, Snyk
https://github.com/bitwiseshiftleft/sjcl/blob/master/core/ecc.js%23L454-L461 Snyk
https://github.com/bitwiseshiftleft/sjcl/commit/ee307459972442a17beebc29dc331fffd8aff796 Snyk
https://security.snyk.io/vuln/SNYK-JS-SJCL-15369617 CISA-ADP, Snyk

Weakness Enumeration

CWE-ID CWE Name Source
CWE-325 Missing Cryptographic Step CISA-ADP  
CWE-347 Improper Verification of Cryptographic Signature Snyk  

Change History

2 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-4258
NVD Published Date:
03/17/2026
NVD Last Modified:
03/17/2026
Source:
Snyk