🛡️ CVE-2026-44885
🟡 CVSS 5.5 — Medium ✅ No Known Exploit CWE-22 NVD
5.5
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

Details

Severity Medium
CVSS Score 5.5
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:L
CWE CWE-22
Public Exploit ✅ No
Source NVD
Published 2026-05-14
Updated 2026-06-10
Modified 2026-06-09
Fix URL N/A

Affected Packages

Software From version Fixed in
github.com/portainer/portainer — —
portainer 2.33.0 2.33.8
unknown — —

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