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

Quick assessment

Affected
Canonical LXD
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Canonical LXD 在 Linux 上 5.0.10、5.21.8 及 6.10 之前版本中，imageDownload 功能缺少适当的授权机制，使得项目受限的客户端能够通过复用本地指纹，在图像或实例导入请求过程中访问其他项目的私有图像。

CVSS 6.3 · Medium

Possible ATT&CK Techniques 1 AI

T1528 · Steal Application Access Token
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I. Basic Information for CVE-2026-86335

Vulnerability Information
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Vulnerability Title
LXD Cross-Project Private Image Theft via Unsanitized GetImageFromAnyProject Local Reuse
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Canonical LXD 5.21.0 ~ 5.21.8 -

II. Public POCs for CVE-2026-86335

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III. Intelligence Information for CVE-2026-86335

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Other References for CVE-2026-86335 (5)

Same Patch Batch · Canonical · 2026-09-28 · 7 CVEs total

CVE-2026-87799 9.9 CRITICAL Arbitrary file write on LXD host via symlink in migration stream
CVE-2026-85526 9.9 CRITICAL Path traversal via Btrfs optimized-backup subvolumes[].path enables root file/dir manipula
CVE-2026-85185 9.6 CRITICAL Path traversal in LXD btrfs storage driver allows arbitrary file deletion and write on hos
CVE-2026-97335 7.7 HIGH Incorrect authorization in LXD storage volume API allows reading volumes from other projec
CVE-2026-87798 5.8 MEDIUM LXD client recursive file pull allows directory escape via malicious VM agent
CVE-2026-86334 4.2 MEDIUM CLI Path Traversal via Content-Disposition in LXD Image Export/Copy

IV. Related Vulnerabilities

Same product: LXD
Same vendor: Canonical
Same weakness: CWE-862

V. Comments for CVE-2026-86335

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