CVE-2021-34079: OS Command injection vulnerability in Mintzo Docker-Tester through 1.2.1 allows attackers to execute arbitrary

Q: How do I fix CVE-2021-34079?

docker-tester: upgrade to newer than 1.2.1. Exact commands for each OS are on this page.

Q: Is CVE-2021-34079 being exploited?

CVE-2021-34079 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-34079 affect?

CVE-2021-34079 affects docker-tester. Severity is critical (CVSS 9.8). OS Command injection vulnerability in Mintzo Docker-Tester through 1.2.1 allows attackers to execute arbitrary commands via shell metacharacters in the 'ports' entry of a crafted docker-compose.yml file.

Q: How urgent is CVE-2021-34079?

Priority 72/100. Critical severity; EPSS top 9%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action; On your watchlist

This week

CRITICAL 9.8REMOTEWATCHLISTUPGRADE

CVE-2021-34079 is a critical-severity flaw (CVSS 9.8) affecting docker-tester. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

OS Command injection vulnerability in Mintzo Docker-Tester through 1.2.1 allows attackers to execute arbitrary commands via shell metacharacters in the 'ports' entry of a crafted docker-compose.yml file.

Why this priority

Critical severity
EPSS top 9%: very likely to be exploited
Public exploit reference
Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	4.1% (top 9%)
CISA exploited list	No
Weakness	CWE-78
Published	2022-06-02
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: docker-tester project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2022-06-02 14:15 UTCPublished CVE record published
2026-06-17 03:55 UTCUpdated Record last modified

docker-tester project docker-tester UPGRADE

Affected: <= 1.2.1

Fixed in: newer than 1.2.1

Safe to downgrade to: no unaffected older release

1. Check installed version

npm ls docker-tester

2. UPGRADE to newer than 1.2.1

npm install docker-tester@">1.2.1"

Exact fixes by distribution

npm · docker-tester · NO FIX YET · vulnerable: <= 1.2.1 · source

Fedora ELN · luksmeta · FIXED · 11-3.eln159 · FEDORA-2026-5176083b78 · source

sudo dnf upgrade --advisory=FEDORA-2026-5176083b78

Fedora 46 · openscad · FIXED · 2021.01-34.fc46 · FEDORA-2026-faf1721128 · source

sudo dnf upgrade --advisory=FEDORA-2026-faf1721128

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-34079?

docker-tester: upgrade to newer than 1.2.1. Exact commands for each OS are on this page.

Is CVE-2021-34079 being exploited?

CVE-2021-34079 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-34079 affect?

CVE-2021-34079 affects docker-tester. Severity is critical (CVSS 9.8). OS Command injection vulnerability in Mintzo Docker-Tester through 1.2.1 allows attackers to execute arbitrary commands via shell metacharacters in the 'ports' entry of a crafted docker-compose.yml file.

How urgent is CVE-2021-34079?

Priority 72/100. Critical severity; EPSS top 9%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action; On your watchlist

Software pages

Docker vulnerabilities

References

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