CVE-2026-55439

MEDIUM 5.5

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

CVSS Score

5.5

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-22
Vendor	halo-dev
Product	halo
Published	Jun 25, 2026
Last Updated	Jun 25, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:L

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

Low

Affected Versions

halo-dev / halo

< 2.24.3

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/halo-dev/halo/security/advisories/GHSA-h8wj-chr2-hf66 github.com: https://github.com/halo-dev/halo/issues/10064