CVE-2026-66898: Path traversal via unvalidated instance name in backup tarball restore enables root file write / RCE
Canonical · LXD
Vendor fix available · Affected: Canonical LXD · Exploitation: unlikely (under 1%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 48% of scored CVEs
DescriptionCVE.org
A path traversal vulnerability in LXD allows an attacker to manipulate file system paths during backup import and restore operations. When importing or restoring a backup archive, LXD fails to validate instance and storage volume names contained within the archive metadata. An attacker can exploit this flaw by supplying a crafted backup archive with malicious instance or volume names containing path traversal sequences, potentially allowing file access or overwriting outside the designated restore directory.
Affected products1
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- Canonical · LXDfrom 4.0.0 before 4.0.12; from 5.0.0 before 5.0.4; from 5.21.0 before 5.21.2; from 6.0 before 6.1
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Unlikely (under 1%). EPSS under 1%, or no score yet.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Vendor
- Canonical
- Published
- August 2026
CoverageNo articles yet
No CyberSIXT article names CVE-2026-66898 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.