CVE-2026-4258
7.5 · HIGHOverview
CVE-2026-4258 is a high-severity vulnerability affecting bitwiseshiftleft stanford_javascript_crypto_library. It was published on March 17, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
Versions of the package sjcl before 1.0.9 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.
Remediation
Check the references section for vendor advisories and patches from bitwiseshiftleft. Update stanford_javascript_crypto_library to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| bitwiseshiftleft | stanford_javascript_crypto_library | 0 | Affected |
References
Frequently Asked Questions
What is CVE-2026-4258?
CVE-2026-4258 is a high-severity vulnerability affecting bitwiseshiftleft stanford_javascript_crypto_library. It was published on March 17, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).
How severe is CVE-2026-4258?
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2026-4258?
Check the references section for vendor advisories and patches from bitwiseshiftleft. Update stanford_javascript_crypto_library to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2026-4258?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-4258 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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