TI-2026-32760 Aliases CVE-2026-44885 GHSA-m8fg-67j7-cx4v

Portainer: Path traversal in backup archive extraction allows arbitrary file write

LOW 26CWE-22Published 2026-05-28 · Updated 2026-05-29

Key facts

Attack vector: Network
Privileges required: High
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: None · High · Low
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00606 49th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Fixed portainer (portainer): 2.33.8github.com/portainer/portainer (Go): 2.33.8

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
portainer	portainer	2.33.0 to before 2.33.8	2.33.8	Patch available	CNA
—	github.com/portainer/portainer (Go)	2.33.0 to before 2.33.8	2.33.8	Patch available	GHSA-m8fg-67j7-cx4v

portainer Vendorportainer Affected 2.33.0 to before 2.33.8 Fixed in 2.33.8 Patch available CNA
github.com/portainer/portainer (Go) Vendor— Affected 2.33.0 to before 2.33.8 Fixed in 2.33.8 Patch available GHSA-m8fg-67j7-cx4v

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:portainer:portainer:::::community:::*	2.33.0 to before 2.33.8	Vulnerable	portainer

cpe:2.3:a:portainer:portainer:*:*:*:*:community:*:*:* Versions 2.33.0 to before 2.33.8 Vulnerable ·portainer

Remediation

Fix · CNA portainer (portainer) Fixed in 2.33.8
Fix · GHSA-m8fg-67j7-cx4v github.com/portainer/portainer (Go) Fixed in 2.33.8 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-44885
2026-10-03 Alias added: GHSA-m8fg-67j7-cx4v
2026-10-25 EPSS moved to the below the 50th percentile

References

Exploit 1

https://github.com/portainer/portainer/security/advisories/GHSA-m8fg-67j7-cx4v

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2026-44885

Other 4

TI-2026-32726 Portainer: Missing authorization on Docker plugin endpoints allows host RCE CVSS 4.0CRITICAL 9.4
TI-2026-32758 Portainer: JWT accepted in URL query leaks tokens to logs and referers CVSS 4.0HIGH 7.7
TI-2026-32727 Portainer: Endpoint security bypass via Swarm service create/update CVSS 4.0CRITICAL 9.4
TI-2020-14859 Portainer 1.24.1 and earlier is affected by incorrect access control that may lead to… CVSS 3.1CRITICAL 9.8
TI-2024-22245 Portainer before 2.20.0 allows redirects when the target is not index.yaml. CVSS 3.1CRITICAL 9.1
TI-2018-13786 A vulnerability was found in Portainer before 1.20.0. CVSS 3.0CRITICAL 9.8

See all 25 →

Sources

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