Vulnerability-Lookup

CVE-2026-62420 (GCVE-0-2026-62420)

Vulnerability from cvelistv5 – Published: 2026-08-12 19:12 – Updated: 2026-08-12 19:27

Title

Cross-project cluster migration bypasses project restrictions via cluster notification flag

Summary

An authorization bypass vulnerability in LXD allows an authenticated attacker to bypass target project security restrictions during cross-project instance migrations. When moving an instance cross-project to a different cluster member via POST /1.0/instances/{name} with migration: true, project: <target>, and target: <member>, the destination node skips all project restriction checks because the request arrives as an internal cluster notification. An attacker can exploit this to introduce disallowed instance configurations into a restricted project.

Severity

9.9 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-12 19:26 UTC

CWE

CWE-863 - Incorrect Authorization

Assigner

canonical

References

3 references

URL	Tags
https://github.com/canonical/lxd/security/advisor…	vdb-entryvendor-advisory
https://github.com/canonical/lxd/pull/18651	patch
https://github.com/canonical/lxd/pull/18605	patch

Impacted products

1 product

Vendor	Product	Version
Canonical	LXD	Affected: 5.0.0 , < 5.0.8 (semver) Affected: 5.21.0 , < 5.21.6 (semver) Affected: 6.0 , < 6.10 (semver)

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

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CVE-2026-62420 (GCVE-0-2026-62420)

Tags

Sightings

Nomenclature