Summary
Incorrect Calculation in the MSR JavaScript Cryptography Library
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.
Impact
CVE-2020-1026 has a CVSS score of 9.8 (High). The vector is network-reachable, no privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (1.5.8); upgrading removes the vulnerable code path.
Affected versions
Security releases
Kodem intelligence
Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.
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Frequently Asked Questions
- What is CVE-2020-1026? CVE-2020-1026 is a high-severity security vulnerability in msrcrypto (npm), affecting versions < 1.5.8. It is fixed in 1.5.8.
- How severe is CVE-2020-1026? CVE-2020-1026 has a CVSS score of 9.8 (High). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
- Which versions of msrcrypto are affected by CVE-2020-1026? msrcrypto (npm) versions < 1.5.8 is affected.
- Is there a fix for CVE-2020-1026? Yes. CVE-2020-1026 is fixed in 1.5.8. Upgrade to this version or later.
- Is CVE-2020-1026 exploitable, and should I be worried? Whether CVE-2020-1026 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
- What actually determines whether CVE-2020-1026 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
- How do I fix CVE-2020-1026? Upgrade
msrcryptoto 1.5.8 or later.