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.
Published: 2026-05-28
Score: 5.5 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-m8fg-67j7-cx4v Portainer has a path traversal in backup archive extraction that allows arbitrary file write
History

Mon, 01 Jun 2026 18:15:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:portainer:portainer:*:*:*:*:community:*:*:*

Fri, 29 May 2026 20:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 28 May 2026 23:45:00 +0000

Type Values Removed Values Added
First Time appeared Portainer
Portainer portainer
Vendors & Products Portainer
Portainer portainer

Thu, 28 May 2026 21:30:00 +0000

Type Values Removed Values Added
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.
Title Portainer: Path traversal in backup archive extraction allows arbitrary file write
Weaknesses CWE-22
References
Metrics cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:L'}


Subscriptions

Portainer Portainer
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-05-29T19:11:01.372Z

Reserved: 2026-05-07T21:50:33.544Z

Link: CVE-2026-44885

cve-icon Vulnrichment

Updated: 2026-05-29T19:10:57.054Z

cve-icon NVD

Status : Analyzed

Published: 2026-05-28T22:16:59.803

Modified: 2026-06-01T18:08:20.353

Link: CVE-2026-44885

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-29T00:30:25Z

Weaknesses