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Fencer Vulns
high 7.5

CVE-2020-26301 json

Command injection in mscdex/ssh2

published 2021-09-20 5 y ago modified 2026-06-17 4 mo ago also GHSA-652h-xwhf-q4h6 , EUVD-2021-1990

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
3.8%
EPSS 3.8% chance of exploitation in 30 days, percentile 90%
public exploits
0
none known

Summary

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.

Patch / fix

  • npm ssh2 1.4.0
  • ssh2_project ssh2 1.4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-26301 updated cvss 5.4

nodejs-ssh2: Command injection by calling vulnerable method with untrusted input

  • Red Hat Openshift Data Foundation 4 noobaa-core-container
    affected: no fix available
  • Red Hat OpenShift Container Storage 4.8 on RHEL-8 ocs4/cephcsi-rhel8 v4.8.5-1, ocs4/mcg-core-rhel8 v4.8.5-1, ocs4/mcg-rhel8-operator v4.8.5-1, ocs4/ocs-rhel8-operator v4.8.5-1, ocs4/ocs-operator-bundle v4.8.5-2, ocs4/ocs-must-gather-rhel8 v4.8.5-1, +2 more
    fixed: vendor fix RHSA-2021:4845

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

3.83% chance of exploitation in the next 30 days, higher than 90% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • securitylab.github.com https://securitylab.github.com/advisories/GHSL-2020-123-mscdex-ssh2/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N
NVD 3.1 10.0 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N

Affected packages

ecosystem package affected fixed in
npm ssh2
<1.4.0
1.4.0

Affected products

  • mscdex ssh2

Classification

Weakness
  • CWE-78 Improper Neutralization of Special Elements used in an OS Command

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.