CVE-2026-55439

Halo: Path Traversal in Backup Download Leads to Arbitrary File Read

Published: Jun 25, 2026Updated: Jun 25, 2026 Sources: CVE List NVDCWE-22

5.5MEDIUM

Description

Halo is an open source website building tool. Prior to 2.24.3, a path traversal vulnerability in the backup download endpoint allows authenticated administrators to read arbitrary files from the server filesystem. The backup download endpoint (GET /apis/console.api.migration.halo.run/v1alpha1/backups/{name}/files/{filename}) in MigrationServiceImpl.download() resolves the backup filename via Path.resolve() without validating that the resolved path stays within the designated backups directory. Also, the Backup creation endpoint (POST /apis/migration.halo.run/v1alpha1/backups) does not sanitize the status fields during creation This vulnerability is fixed in 2.24.3.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:HPrivileges Required

High

UI:NUser Interaction

None

Scope

S:UScope

Unchanged

Impact

C:HConfidentiality

High

I:NIntegrity

None

A:LAvailability

Low

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Weaknesses

CWE-22

Affected Products

halo-dev

oss-projectaka halo

haloOn-prem

Web & CMS Plugins / cms-core

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

Attack Graph

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MITRE ATT&CK

2 techniques

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Discovery

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References

https://github.com/halo-dev/halo/security/advisories/GHSA-h8wj-chr2-hf66

github.com

https://github.com/halo-dev/halo/issues/10064

github.com

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