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CVE-2026-44885

nvd nist
Published: May 28, 2026Modified: Jul 21, 2026

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5.5
Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:L
Exploitability: 1.2 / Impact: 4.2
Source: security-advisories@github.com (Secondary)

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.

Affected (1)

Products: Portainer: Portainer
Portainer
1 product
Portainer
Configuration A
1 vulnerable
Vulnerable SoftwareAffected Versions
Portainer
From 2.33.0 to 2.33.8

Related CWEs

CWE-22
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

References (2)

Source: security-advisories@github.com
Broken Link
Source: security-advisories@github.com
ExploitThird Party Advisory

Timeline

No history available yet.