CVE-2026-44883: Portainer Community Edition is a lightweight service delivery platform for containerized applications that can

Routine

HIGH 7.5UPGRADE

CVE-2026-44883 is a high-severity flaw (CVSS 7.5) 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 2.33.8, 2.39.2, and 2.41.0, Portainer's authentication middleware accepts JWT bearer tokens passed as the ?token=<JWT> URL query parameter on any authenticated API endpoint, in addition to the standard Authorization: Bearer header. URLs are recorded i

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.3% (top 79%)
CISA exploited list	No
Weakness	CWE-598
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 · >= 2.34.0 and < 2.39.2 · >= 2.40.0 and < 2.41.0

Fixed in: 2.33.8, 2.39.2, 2.41.0

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-2026-44883?

portainer: upgrade to 2.33.8, 2.39.2, 2.41.0. Exact commands for each OS are on this page.

Is CVE-2026-44883 being exploited?

CVE-2026-44883 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-2026-44883 affect?

CVE-2026-44883 affects portainer. Severity is high (CVSS 7.5). 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 2.33.8, 2.39.2, and 2.41.0, Portainer's a

How urgent is CVE-2026-44883?

Priority 37/100. High severity; Public exploit reference

Software pages

Docker vulnerabilities · Kubernetes vulnerabilities

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References

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