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TI-2026-59919 Aliases CVE-2026-87798

LXD client recursive file pull allows directory escape via malicious VM agent

Priority LOW 25CWE-59Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Required
Attack complexity
High
Impact type
—
Confidentiality · integrity · availability
None · High · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00188 8th percentileScored 2026-11-07
Fix Fixed LXD (Canonical): 4.0.14, 5.0.10, 5.21.8 +1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
CanonicalLXD4.0.2 to before 4.0.14; 5.0.0 to before 5.0.10; 5.21.0 to before 5.21.8; 6.0 to before 6.94.0.14, 5.0.10, 5.21.8, 6.9Patch availableCNA
  • LXD VendorCanonical Affected 4.0.2 to before 4.0.14; 5.0.0 to before 5.0.10; 5.21.0 to before 5.21.8; 6.0 to before 6.9 Fixed in 4.0.14, 5.0.10, 5.21.8, 6.9 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:canonical:lxd:*:*:*:*:*:*:*:*——Canonical
  • cpe:2.3:a:canonical:lxd:*:*:*:*:*:*:*:* Versions — — ·Canonical

Remediation

  • Fix · CNA LXD (Canonical) Fixed in 4.0.14, 5.0.10, 5.21.8, 6.9

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-87798

References

Advisory 1

  • TI-2020-09349 An issue was discovered in SaltStack Salt before 2019.2.4 and 3000 before 3000.2. KEVCVSS 3.1CRITICAL 9.8
  • TI-2020-05854 smtp_mailaddr in smtp_session.c in OpenSMTPD 6.6, as used in OpenBSD 6.6 and other… KEVCVSS 3.1CRITICAL 9.8
  • TI-2020-01431 Netlogon Elevation of Privilege Vulnerability KEVCVSS 3.1CRITICAL 10.0
  • TI-2019-12627 Exim 4.92 through 4.92.2 allows remote code execution, a different vulnerability than… KEVCVSS 3.1CRITICAL 9.8
  • TI-2019-08259 Underflow in PHP-FPM can lead to RCE KEVCVSS 3.1CRITICAL 9.8
  • TI-2019-07471 OS command injection in exim KEVCVSS 3.1CRITICAL 9.8
See all 4301 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences