CVE-2026-4258
- Source
- https://cve.org/CVERecord?id=CVE-2026-4258
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-4258.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-4258
- Aliases
- Published
- 2026-03-17T06:16:18.590Z
- Modified
- 2026-04-10T05:43:25.695908Z
- Severity
-
- 7.7 (High) CVSS_V4 - 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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X CVSS Calculator
- Summary
- [none]
- Details
-
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.
- References