CVE-2020-13597: Clusters using Calico (version 3.14.0 and below), Calico Enterprise (version 2.8.2 and below), may be vulnerab

Routine

MEDIUM 6.0UPGRADE

CVE-2020-13597 is a medium-severity flaw (CVSS 6.0) affecting calico. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Clusters using Calico (version 3.14.0 and below), Calico Enterprise (version 2.8.2 and below), may be vulnerable to information disclosure if IPv6 is enabled but unused. A compromised pod with sufficient privilege is able to reconfigure the node’s IPv6 interface due to the node accepting route advertisement by default, allowing the attacker to redirect full or partial network traffic from the node to the compromised pod.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.0 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.9% (top 40%)
CISA exploited list	No
Weakness	CWE-201, CWE-200
Published	2020-06-03
Last modified	2026-06-17

Publisher (CNA): Tigera, Inc. · Vendor: projectcalico

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

Am I affected?

Timeline

2020-06-03 17:15 UTCPublished CVE record published
2026-06-17 02:53 UTCUpdated Record last modified

projectcalico calico UPGRADE

Affected: <= 2.6.2 · <= 3.8.8 · >= 2.7.0 and <= 2.7.4 · >= 2.8.0 and <= 2.8.2 · >= 3.9.0 and <= 3.9.5 · >= 3.10.0 and <= 3.10.3 · >= 3.11.0 and <= 3.11.2 · >= 3.12.0 and <= 3.12.1

Fixed in: newer than 3.13.3

Safe to downgrade to: a release before 2.7.0

1. Check installed version

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

2. UPGRADE to newer than 3.13.3 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade calico

Note

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

3. If no update is available yet, DOWNGRADE to a release before 2.7.0 (Debian / Ubuntu)

apt-cache madison calico sudo apt install calico=<VERSION_BEFORE_2.7.0> sudo apt-mark hold calico

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list calico sudo dnf downgrade calico-<VERSION_BEFORE_2.7.0> sudo dnf versionlock add calico

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2020-13597?

calico: upgrade to newer than 3.13.3. Exact commands for each OS are on this page.

Is CVE-2020-13597 being exploited?

CVE-2020-13597 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-2020-13597 affect?

CVE-2020-13597 affects calico. Severity is medium (CVSS 6.0). Clusters using Calico (version 3.14.0 and below), Calico Enterprise (version 2.8.2 and below), may be vulnerable to information disclosure if IPv6 is enabled but unused. A compromised pod with sufficient privilege is able to reconfigure the

How urgent is CVE-2020-13597?

Priority 36/100. No elevated risk signals yet.

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References

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