Vulnerability Description
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, Portainer's backup restore feature accepts a .tar.gz archive and extracts it to a target directory on the server. The extraction function (ExtractTarGz in api/archive/targz.go) constructed output paths using filepath.Clean(filepath.Join(outputDirPath, header.Name)). This combination does not prevent directory traversal — a tar entry named ../../etc/cron.d/evil resolves to a path outside the extraction root, so a crafted archive can write files to arbitrary locations on the server filesystem. This vulnerability is fixed in 2.33.8.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Portainer | Portainer | >= 2.33.0, < 2.33.8 |
Related Weaknesses (CWE)
References
- https://github.com/portainer/portainer-suite/pull/1875Broken Link
- https://github.com/portainer/portainer/security/advisories/GHSA-m8fg-67j7-cx4vExploitThird Party Advisory
FAQ
What is CVE-2026-44885?
CVE-2026-44885 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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...
How severe is CVE-2026-44885?
CVE-2026-44885 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-44885?
Check the references section above for vendor advisories and patch information. Affected products include: Portainer Portainer.