CVE-2020-26301

Name: CVE-2020-26301
Creator: NVD / NIST
Published: 2021-09-20T20:15:11.513+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 10/10EPSS 3.83%

Last modified Jun 17, 2026

CVE-2020-26301 is a critical-severity vulnerability rated 10/10 on the CVSS scale. ssh2 is client and server modules written in pure JavaScript for node.js. In ssh2 before version 1.4.0 there is a command injection vulnerability. EPSS estimates a 3.83% chance of exploitation in the next 30 days.

Description

ssh2 is client and server modules written in pure JavaScript for node.js. In ssh2 before version 1.4.0 there is a command injection vulnerability. The issue only exists on Windows. This issue may lead to remote code execution if a client of the library calls the vulnerable method with untrusted input. This is fixed in version 1.4.0.

Metrics

CVSS 3.1

10/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

EPSS Probability

3.83%

88.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-78

Affected Software

Vendor	Product	Versions
Ssh2 Project	Ssh2	< 1.4.0

References

https://github.com/mscdex/ssh2/commit/f763271f41320e71d5cbee02ea5bc6a2ded3ca21Patch, Third Party Advisory
https://securitylab.github.com/advisories/GHSL-2020-123-mscdex-ssh2/Exploit, Patch, Third Party Advisory
https://www.npmjs.com/package/ssh2Product, Third Party Advisory
https://github.com/mscdex/ssh2/commit/f763271f41320e71d5cbee02ea5bc6a2ded3ca21Patch, Third Party Advisory
https://securitylab.github.com/advisories/GHSL-2020-123-mscdex-ssh2/Exploit, Patch, Third Party Advisory
https://www.npmjs.com/package/ssh2Product, Third Party Advisory

Timeline

Published: Sep 20, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-26301?

How severe is CVE-2020-26301?

CVE-2020-26301 has a CVSS score of 10/10 (CRITICAL severity). The EPSS model estimates a 3.83% probability of exploitation in the next 30 days.

How do I fix CVE-2020-26301?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-26301?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST