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TI-2026-22659 Aliases CVE-2026-28384

Authenticated RCE via unsanitized compression_algorithm

Priority HIGH 82CWE-78Published · Updated

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-78.

Summary

An improper sanitization of the compression_algorithm parameter in Canonical LXD allows an authenticated, unprivileged user to execute commands as the LXD daemon on the LXD server via API calls to the image and backup endpoints. This issue affected LXD from 4.12 through 6.6 and was fixed in the snap versions 5.0.6-e49d9f4 (channel 5.0/stable), 5.21.4-1374f39 (channel 5.21/stable), and 6.7-1f11451 (channel 6.0 stable). The channel 4.0/stable is not affected as it contains version 4.0.10.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00768 55th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD
Fix Fixed lxd (Canonical): 6.7, 5.21.4, 5.0.6

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Total

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

Affected products

VendorProductAffected versionsFixed inStatusSource
Canonicallxd6.0 to before 6.7; 5.21.0 to before 5.21.4; 5.0.0 to before 5.0.6; 4.126.7, 5.21.4, 5.0.6Patch availableCNA
  • lxd VendorCanonical Affected 6.0 to before 6.7; 5.21.0 to before 5.21.4; 5.0.0 to before 5.0.6; 4.12 Fixed in 6.7, 5.21.4, 5.0.6 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:canonical:lxd:*:*:*:*:*:*:*:*4.12 to before 5.0.6; 5.21.0 to before 5.21.4; 6.0 to before 6.7VulnerableCanonical
  • cpe:2.3:a:canonical:lxd:*:*:*:*:*:*:*:* Versions 4.12 to before 5.0.6; 5.21.0 to before 5.21.4; 6.0 to before 6.7 Vulnerable ·Canonical

Remediation

  • Fix · CNA lxd (Canonical) Fixed in 6.7, 5.21.4, 5.0.6

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-28384

References

Exploit 2

Patch 3

  • TI-2026-47475 Path traversal via unvalidated instance name in backup tarball restore enables root file write / RCE CVSS 3.1CRITICAL 9.9
  • TI-2026-45146 Cross-project instance move bypasses all project restrictions allowing host command execution CVSS 3.1CRITICAL 9.9
  • TI-2026-45143 Cross-project instance copy bypasses target project restrictions via TOCTOU in config merge CVSS 3.1CRITICAL 9.9
  • TI-2026-45142 Project restriction bypass via instance migration config override CVSS 3.1CRITICAL 9.9
  • TI-2026-45140 Root RCE via image backup.yaml symlink CVSS 3.1CRITICAL 9.9
  • TI-2026-45139 Arbitrary File Read/Write: metadata.yaml symlink in image allows host filesystem access as root CVSS 3.1CRITICAL 9.9
See all 34 →

Sources

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