Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-63299

CVE-2026-63299CRITICAL

Canonical LXD — Storage volume cross-project move and snapshot restore bypass project disk limits

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   L   N  C  H  H  H    9.9   .0059   46.2     —

AFFECTED
  Product  Versions  Fixed
  LXD      5.0.0 –   —

TIMELINE
  Jul 16  Reserved by canonical
  Aug 12  Published (CNA: canonical)
  Sep 11  EXPLOIT PUBLISHED — CVE-2026-63299 (Canonical LXD). Public exploit reference added.

CWE-770 · CNA: canonical · CVSS v3.1 · 1 reference · NVD status: Analyzed

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
July 16, 2026	Reserved	Reserved by canonical
August 12, 2026	Published	Published (CNA: canonical)
September 11, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-63299 (Canonical LXD). Public exploit reference added.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Canonical	LXD	—	5.0.0	—

Weaknesses

CWE-770

References (1)

https://github.com/canonical/lxd/security/advisories/GHSA-5h78-p252-989h [Vendor Advisory, Exploit, Mitigation]

Authoritative record: CVE-2026-63299 at cve.org

Vendors: canonical

Weaknesses: CWE-770

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-63299 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.