CVE-2026-55439

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.

CVSS 3.1

5.5CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:L

EPSS

0.5% chance of exploitation in the next 30 days; higher than 42% of CVEs (scores of 2026-10-25)

CWE

CWE-22

Published

2026-06-25

Modified

2026-10-25

Record from

the NVD, synced 2026-10-25

References

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

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