Vulnerability in Canonical Lxd
CVE-2026-87798
Improper link resolution in the recursive file pull feature of the LXD CLI client in Canonical LXD versions 4.0.2 up to 6.9 (fixed in 4.0.14, 5.0.10 and 5.21.8) on Linux allows an attacker with root access inside a virtual machine to write attacker-controlled files or directory trees to arbitrary paths on the client host, with the operator's privileges. The attacker does this by using a modified lxd-agent that returns inconsistent SFTP directory listings and Lstat results.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:N/I:H/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/canonical/lxd/security/advisories/GHSA-mr8v-hx34-hfvf (vendor-advisory)
Frequently asked questions
- What is CVE-2026-87798?
- CVE-2026-87798 is a medium-severity vulnerability in Canonical Lxd, classified under Improper Link Resolution Before File Access. CVSS score: 5.8/10. Published 2026-09-28.
- How severe is CVE-2026-87798?
- Medium severity. CVSS v3 base score is 5.8 out of 10.