CVE-2026-87798
MEDIUMDescription
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.
How to fix
No published remediation has been found for this vulnerability's affected products yet.
Mitigation guidance may be in the linked vendor advisories in the References section below.
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CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:N/I:H/A:N
Exploit Intelligence
Low risk: more likely to be exploited than 8% of all known CVEs.
References
Related Vulnerabilities
Other CWE-59 (Link Following) vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2022-30333 | High | 7.5 | 99% | KEV + Ransom | Fix |
| CVE-2021-21300 | High | 8.0 | 89% | - | Fix |
| CVE-2021-32610 | High | 7.1 | 73% | - | Fix |
| CVE-2020-36193 | High | 7.5 | 71% | KEV | Fix |
| CVE-2023-40028 | Medium | 4.9 | 69% | - | Fix |
| CVE-2024-57728 | High | 7.2 | 65% | KEV + Ransom | Fix |
Common questions
How do I fix CVE-2026-87798?
No published fix for CVE-2026-87798 has been found yet. Check the linked vendor advisories for guidance as it becomes available.
Is CVE-2026-87798 being actively exploited?
Not that we know of. CVE-2026-87798 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.19% is the estimated probability that it will be exploited in the next 30 days. That is higher than 8% of all scored CVEs.
How severe is CVE-2026-87798?
CVE-2026-87798 has a CVSS v3 base score of 5.8, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-09-28.