CVE-2026-41185: When Calico is configured with the Azure IPAM plugin, the Calico CNI binary mutates the incoming CNI configura

Routine

MEDIUM 6.5UPGRADE

CVE-2026-41185 is a medium-severity flaw (CVSS 6.5) affecting calico. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

When Calico is configured with the Azure IPAM plugin, the Calico CNI binary mutates the incoming CNI configuration to attach subnet information before delegating to the IPAM plugin. After mutating, the Azure IPAM helper logs the entire unmarshaled configuration map (stdinData) at INFO level to /var/log/calico/cni/cni.log on every CNI ADD and DEL invocation — once per pod scheduled or terminated on the node. When the cluster is deployed using toke

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 75%)
CISA exploited list	No
Weakness	CWE-532
Published	2026-05-28
Last modified	2026-06-17

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

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

Am I affected?

Timeline

2026-05-28 17:16 UTCPublished CVE record published
2026-06-17 10:46 UTCUpdated Record last modified

tigera calico UPGRADE

Affected: < 3.21.7 · < 3.32.0 · < 22.4.0 · >= 3.22.0 and < 3.22.3

Fixed in: 3.21.7, 3.22.3, 3.32.0, 22.4.0

Safe to downgrade to: a release before 3.22.0

1. Check installed version

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

2. UPGRADE to 3.21.7 (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 3.22.0 (Debian / Ubuntu)

apt-cache madison calico sudo apt install calico=<VERSION_BEFORE_3.22.0> 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_3.22.0> 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-2026-41185?

calico: upgrade to 3.21.7, 3.22.3, 3.32.0, 22.4.0. Exact commands for each OS are on this page.

Is CVE-2026-41185 being exploited?

CVE-2026-41185 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-2026-41185 affect?

CVE-2026-41185 affects calico. Severity is medium (CVSS 6.5). When Calico is configured with the Azure IPAM plugin, the Calico CNI binary mutates the incoming CNI configuration to attach subnet information before delegating to the IPAM plugin. After mutating, the Azure IPAM helper logs the entire unma

How urgent is CVE-2026-41185?

Priority 29/100. No elevated risk signals yet.

Software pages

Azure vulnerabilities

Related CVEs

CVE-2026-41184 MEDIUM 6.5 UPGRADE In Calico, the install-cni init container logs the rendered CNI configuration to standard output
CVE-2026-41186 HIGH 7.5 UPGRADE When Calico's shared debug server is enabled (disabled by default), the Calico kube-controllers and Goldmane c
CVE-2026-41187 MEDIUM 6.5 UPGRADE Calico's apiserver wraps tier-scoped resources so that every operation runs through AuthorizeTierOperation, bu
CVE-2026-6540 HIGH 7.5 UPGRADE Calico's Application Layer Policy (disabled by default), which enforces HTTP rules through Dikastes, fails to

References

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