How severe is CVE-2026-63295?

CVE-2026-63295 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2026-63295 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-63295?

CVE-2026-63295 affects Canonical Lxd. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-63295?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2026-63295 published?

CVE-2026-63295 was published on 2026-08-12 and last updated on 2026-09-11.

CVE-2026-63295

CVE-2026-63295 is a medium-severity vulnerability in Canonical Lxd with a CVSS 3.x base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-863.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
EPSS exploit prediction: 0% (26th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-863
Affected product: Canonical Lxd
Published: 2026-08-12
Last modified: 2026-09-11

Description

An authorization bypass vulnerability in LXD allows an authenticated attacker to bypass project-level container isolation restrictions. When a project is configured with restrictions on container privileges (such as enforcing restricted.containers.privilege=isolated), LXD fails to enforce the requirement if an instance configuration omits the security.idmap.isolated key. An attacker can exploit this flaw by creating or updating an instance without explicitly setting security.idmap.isolated, bypassing the target project's security constraints.

Frequently asked questions

What is CVE-2026-63295?: An authorization bypass vulnerability in LXD allows an authenticated attacker to bypass project-level container isolation restrictions. When a project is configured with restrictions on container privileges (such as enforcing restricted.containers.privilege=isolated), LXD fails to enforce the requirement if an instance configuration omits the security.idmap.isolated key. An attacker can exploit this flaw by creating or updating an instance without explicitly setting security.idmap.isolated, bypassing the target project's security constraints.
How severe is CVE-2026-63295?: CVE-2026-63295 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2026-63295 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-63295?: CVE-2026-63295 affects Canonical Lxd. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-63295?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2026-63295 published?: CVE-2026-63295 was published on 2026-08-12 and last updated on 2026-09-11.

References

https://github.com/canonical/lxd/security/advisories/GHSA-7vp9-3vmp-c5jm

Affected products (1)

cpe:2.3:a:canonical:lxd:*:*:*:*:*:*:*:*

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