CVE-2026-115370: Incus restriction bypass in clustered migration refresh

CVE-2026-115370 · Severity: medium · CVSS 4.3 · Published 2026-10-22

Incus is a container and virtual machine management system. In clustered deployments, users with restricted project permissions can bypass security controls to trigger outbound network connections from the server to arbitrary destinations, allowing them to probe services and networks that the server can reach. This affects only clustered installations, not standalone servers.

Technologies: LXC Incus. Vendors: LXC.

Quick answers

Is CVE-2026-115370 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-115370 being exploited in the wild.
How severe is CVE-2026-115370?
Medium severity, with a CVSS score of 4.3, published 22 October 2026.
Which products and versions are affected?
LXC Incus 6.0.5 before 6.0.7, 6.12.0 before 7.0.2, 7.1.0 before 7.5.0.
Is there a fix for CVE-2026-115370?
Yes: fixed in Incus 6.0.7, 7.0.2, 7.5.0. Until then: Do not grant instance creation rights in restricted projects on clustered servers to users who should not be able to initiate outbound connections from the server. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-115370 attacked?
It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-115370?
Check whether you run LXC Incus at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • Fixed in: Incus 6.0.7, 7.0.2, 7.5.0

Do not grant instance creation rights in restricted projects on clustered servers to users who should not be able to initiate outbound connections from the server.

Technical details

A pull mode migration restriction is not enforced in the refresh short-circuit path on clustered servers, allowing instance creation rights holders in restricted projects to trigger refresh migration requests that bypass authorization checks. An attacker can force the server to open outbound TLS websocket connections to attacker-controlled URLs, enabling network reconnaissance. The vulnerability is an incorrect authorization check (CWE-863) combined with server-side request forgery characteristics (CWE-918); fixes are available in patched versions.

Affected products

  • LXC Incus 6.0.5 before 6.0.7, 6.12.0 before 7.0.2, 7.1.0 before 7.5.0

Timeline

  • 2026-09-25: disclosed
  • 2026-10-22: advisory

References

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