CVSS 3.1
9.8 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HCVE-2020-1026
Critical (9.8) in microsoft research javascript cryptography library. EPSS 2.6% chance of exploitation in the next 30 days. Fixed in msrcrypto 1.5.8.
A Security Feature Bypass vulnerability exists in the MSR JavaScript Cryptography Library that is caused by multiple bugs in the library’s Elliptic Curve Cryptography (ECC) implementation.An attacker could potentially abuse these bugs to learn information about a server’s private ECC key (a key leakage attack) or craft an invalid ECDSA signature that nevertheless passes as valid.The security update addresses the vulnerability by fixing the bugs disclosed in the ECC implementation, aka 'MSR JavaScript Cryptography Library Security Feature Bypass Vulnerability'.
Severity
- EPSS
- 2.6% chance of exploitation in the next 30 days; higher than 85% of CVEs (scores of 2026-10-31)
- CWEs
- CWE-200, CWE-347
- Published
- Modified
- Record from
- the NVD, synced
Affected
- microsoft:research_javascript_cryptography_library
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-9x9j-836w-8f55 | npm | msrcrypto | <1.5.8 | 1.5.8 |