CVE-2026-4258Versions 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().
Updated under an hour ago ()
Does this affect you?
It affects bitwiseshiftleft stanford_javascript_crypto_library. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
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.
- CVSS
- 7.5 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- Weakness (CWE)
- CWE-347, CWE-325
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Modified
- Record last updated
- Jul 28, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
bitwiseshiftleft stanford_javascript_crypto_library bitwiseshiftleft:stanford_javascript_crypto_library | through 1.0.8 | NVD |
References
- https://gist.github.com/Kr0emer/2560f98edb10b0b34f2438cd63913c47exploit, mitigation, third-party-advisory
- https://github.com/bitwiseshiftleft/sjcl/blob/master/core/ecc.js%23L454-L461broken-link
- https://github.com/bitwiseshiftleft/sjcl/commit/ee307459972442a17beebc29dc331fffd8aff796patch
- https://security.snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-15751243
- https://security.snyk.io/vuln/SNYK-JS-SJCL-15369617exploit, third-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.