CVE-2021-3495: An incorrect access control flaw was found in the kiali-operator in versions before 1.33.0 and before 1.24.7

This month

HIGH 8.8WATCHLISTUPGRADEDOWNGRADE

CVE-2021-3495 is a high-severity flaw (CVSS 8.8) affecting kiali-operator, openshift service mesh. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An incorrect access control flaw was found in the kiali-operator in versions before 1.33.0 and before 1.24.7. This flaw allows an attacker with a basic level of access to the cluster (to deploy a kiali operand) to use this vulnerability and deploy a given image to anywhere in the cluster, potentially gaining access to privileged service account tokens. The highest threat from this vulnerability is to data confidentiality and integrity as well as

Why this priority

High severity
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	1.0% (top 38%)
CISA exploited list	No
Weakness	CWE-281
Published	2021-06-01
Last modified	2026-06-17

Publisher (CNA): Red Hat, Inc. · Vendor: netlify · redhat

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

Am I affected?

Timeline

2021-06-01 14:15 UTCPublished CVE record published
2026-06-17 04:05 UTCUpdated Record last modified

netlify kiali-operator UPGRADE

Affected: < 1.24.7 · >= 1.30.0 and < 1.33.0

Fixed in: 1.24.7, 1.33.0

Safe to downgrade to: a release before 1.30.0

1. Check installed version

apt-cache policy kiali-operator || rpm -q kiali-operator || kiali-operator --version

2. UPGRADE to 1.24.7 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade kiali-operator

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade kiali-operator

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 1.30.0 (Debian / Ubuntu)

apt-cache madison kiali-operator sudo apt install kiali-operator=<VERSION_BEFORE_1.30.0> sudo apt-mark hold kiali-operator

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

dnf --showduplicates list kiali-operator sudo dnf downgrade kiali-operator-<VERSION_BEFORE_1.30.0> sudo dnf versionlock add kiali-operator

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.

redhat openshift service mesh DOWNGRADE

Affected: 1.0 · 2.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0

1. Check installed version

apt-cache policy openshift-service-mesh || rpm -q openshift-service-mesh || openshift-service-mesh --version

2. No fixed release: DOWNGRADE to a release before 1.0 (Debian / Ubuntu)

apt-cache madison openshift-service-mesh sudo apt install openshift-service-mesh=<VERSION_BEFORE_1.0> sudo apt-mark hold openshift-service-mesh

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list openshift-service-mesh sudo dnf downgrade openshift-service-mesh-<VERSION_BEFORE_1.0> sudo dnf versionlock add openshift-service-mesh

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-2021-3495?

kiali-operator: upgrade to 1.24.7, 1.33.0; openshift service mesh: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-3495 being exploited?

CVE-2021-3495 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-2021-3495 affect?

CVE-2021-3495 affects kiali-operator, openshift service mesh. Severity is high (CVSS 8.8). An incorrect access control flaw was found in the kiali-operator in versions before 1.33.0 and before 1.24.7. This flaw allows an attacker with a basic level of access to the cluster (to deploy a kiali operand) to use this vulnerability and

How urgent is CVE-2021-3495?

Priority 51/100. High severity; On your watchlist

Software pages

Red Hat OpenShift vulnerabilities

References

← Back to latest CVEs