CVE-2026-86334

CLI Path Traversal via Content-Disposition in LXD Image Export/Copy

MEDIUM
4.2
CVSS Score
Published: September 28, 2026 at 01:21 PM UTC
Updated: September 28, 2026 at 06:17 PM UTC
1 product affected across 1 vendorLXD

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Severity
MEDIUM4.2
Exploit prediction
EPSS 0.3%
SSVC
PoC

Description

Path traversal in the CLI client image export and copy functionality in Canonical LXD from 4.0.2 before 4.0.14, 5.0.10, 5.21.8, and 6.10 on all platforms allows a remote malicious or machine-in-the-middle image server to overwrite arbitrary local files and execute code on the client system via a crafted Content-Disposition header filename parameter during unified image export or copy operations into a local directory target.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

4.0.2 ≤ v < 4.0.145.0.0 ≤ v < 5.0.105.21.0 ≤ v < 5.21.86.0 ≤ v < 6.104.0.25.0.05.21.06.0
Affected range stops below 4.0.14, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.0.10, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.21.8, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.10, so it looks safe — our inference, not a vendor statement

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.2MEDIUMcanonical
Attack Vector
NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
LOW
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-22

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