CVE-2020-35209: An issue in Atomix v3.1.5 allows unauthorized Atomix nodes to join a target cluster via providing configuratio

Q: How do I fix CVE-2020-35209?

atomix: upgrade to newer than 3.1.5. Exact commands for each OS are on this page.

Q: Is CVE-2020-35209 being exploited?

CVE-2020-35209 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-2020-35209 affect?

CVE-2020-35209 affects atomix. Severity is high (CVSS 7.5). An issue in Atomix v3.1.5 allows unauthorized Atomix nodes to join a target cluster via providing configuration information.

Q: How urgent is CVE-2020-35209?

Priority 46/100. High severity; Remotely exploitable, no login, no user action

This month

HIGH 7.5REMOTEUPGRADE

CVE-2020-35209 is a high-severity flaw (CVSS 7.5) affecting atomix. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue in Atomix v3.1.5 allows unauthorized Atomix nodes to join a target cluster via providing configuration information.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.9% (top 39%)
CISA exploited list	No
Published	2021-12-16
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: atomix

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

Am I affected?

Timeline

2021-12-16 20:15 UTCPublished CVE record published
2026-06-17 03:13 UTCUpdated Record last modified

atomix atomix UPGRADE

Affected: <= 3.1.5

Fixed in: newer than 3.1.5

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy atomix || rpm -q atomix || atomix --version

2. UPGRADE to newer than 3.1.5 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade atomix

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade atomix

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2020-35209?

atomix: upgrade to newer than 3.1.5. Exact commands for each OS are on this page.

Is CVE-2020-35209 being exploited?

CVE-2020-35209 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-2020-35209 affect?

CVE-2020-35209 affects atomix. Severity is high (CVSS 7.5). An issue in Atomix v3.1.5 allows unauthorized Atomix nodes to join a target cluster via providing configuration information.

How urgent is CVE-2020-35209?

Priority 46/100. High severity; Remotely exploitable, no login, no user action

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References

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