CVE-2026-44882: Portainer Community Edition is a lightweight service delivery platform for containerized applications that can

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HIGH 8.1UPGRADE

CVE-2026-44882 is a high-severity flaw (CVSS 8.1) affecting portainer. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Portainer Community Edition is a lightweight service delivery platform for containerized applications that can be used to manage Docker, Swarm, Kubernetes and ACI environments. From 2.33.0 to before 2.33., Portainer proxies requests to Kubernetes clusters through a middleware layer (kubeClientMiddleware) that validates the requesting user's token before forwarding traffic to the cluster. When security.RetrieveTokenData returned an error, the midd

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	8.1 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 73%)
CISA exploited list	No
Weakness	CWE-863
Published	2026-05-28
Last modified	2026-07-21

Publisher (CNA): GitHub, Inc. · Vendor: portainer

Last updated 2026-07-21 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-28 22:16 UTCPublished CVE record published
2026-07-21 10:10 UTCUpdated Record last modified

portainer portainer UPGRADE

Affected: >= 2.33.0 and < 2.33.8

Fixed in: 2.33.8

Safe to downgrade to: a release before 2.33.0

1. Check installed version

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

2. UPGRADE to 2.33.8 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade portainer

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 2.33.0 (Debian / Ubuntu)

apt-cache madison portainer sudo apt install portainer=<VERSION_BEFORE_2.33.0> sudo apt-mark hold portainer

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

dnf --showduplicates list portainer sudo dnf downgrade portainer-<VERSION_BEFORE_2.33.0> sudo dnf versionlock add portainer

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-2026-44882?

portainer: upgrade to 2.33.8. Exact commands for each OS are on this page.

Is CVE-2026-44882 being exploited?

CVE-2026-44882 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-2026-44882 affect?

CVE-2026-44882 affects portainer. Severity is high (CVSS 8.1). Portainer Community Edition is a lightweight service delivery platform for containerized applications that can be used to manage Docker, Swarm, Kubernetes and ACI environments. From 2.33.0 to before 2.33., Portainer proxies requests to Kube

How urgent is CVE-2026-44882?

Priority 40/100. High severity; Public exploit reference

Software pages

Docker vulnerabilities · Kubernetes vulnerabilities

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References

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