CVE-2026-86335: LXD Cross-Project Private Image Theft via Unsanitized GetImageFromAnyProject Local Reuse

Severity: medium (CVSS 6.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-28 · updated 2026-09-28
Weakness: CWE-862

Description

Missing Authorization in imageDownload in Canonical LXD before 5.0.10, 5.21.8, and 6.10 on Linux allows a project-restricted client to access private images from other projects via local fingerprint reuse during image or instance import requests.

Affected products

Canonical LXD: from 5.21.0 before 5.21.8; from 6.0 before 6.10; from 4.0 before 5.0.10 — fixed in 5.0.10, 5.21.8, 6.10

How to fix

Upgrade to a fixed version: Canonical LXD 5.0.10, 5.21.8, 6.10. Check the vendor advisory for mitigations.

References

https://github.com/canonical/lxd/pull/18987
https://github.com/canonical/lxd/pull/19001
https://github.com/canonical/lxd/pull/19002
https://github.com/canonical/lxd/pull/19003
https://github.com/canonical/lxd/security/advisories/GHSA-j7p3-5g2v-69j8

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