CVE-2026-66898

NameCVE-2026-66898
DescriptionA 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.
SourceCVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
lxd (PTS)bookworm, bookworm (security)5.0.2-5+deb12u6vulnerable
trixie (security), trixie5.0.2+git20231211.1364ae4-9+deb13u7vulnerable

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
lxdsource(unstable)(unfixed)

Notes

https://github.com/canonical/lxd/security/advisories/GHSA-m857-c7gc-c984

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