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CVE-2026-44881: Portainer Community Edition is a lightweight service delivery platform for containerized applications that can

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This month
CRITICAL 9.9UPGRADE

CVE-2026-44881 is a critical-severity flaw (CVSS 9.9) 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 supports deploying stacks from Git repositories. When a Git-backed stack is created or updated, Portainer clones the repository using go-git v5, which translates Git blob entries with mode 0o120000 (symlink) into

Why this priority

  • Critical severity
  • Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score9.9 (Critical)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededLow
User interactionNone
EPSS exploit chance0.5% (top 57%)
CISA exploited listNo
WeaknessCWE-59, CWE-200
Published2026-05-28
Last modified2026-07-21
Publisher (CNA): GitHub, Inc. · Vendor: portainer

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

Am I affected?

Timeline

portainer portainer UPGRADE
Affected: >= 2.33.0 and < 2.33.8 · >= 2.34.0 and < 2.39.2 · 2.40.0
Fixed in: 2.33.8, 2.39.2
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-2026-44881?

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

Is CVE-2026-44881 being exploited?

CVE-2026-44881 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-2026-44881 affect?

CVE-2026-44881 affects portainer. Severity is critical (CVSS 9.9). 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 sup

How urgent is CVE-2026-44881?

Priority 50/100. Critical severity; Public exploit reference

Software pages

Docker vulnerabilities · Kubernetes vulnerabilities · Git vulnerabilities

Related CVEs

References

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