Authorization Flaw in Incus (CVE-2026-62941)
Summary
Vulnerability in Incus (CVE-2026-62941). Successful exploitation can lead to full system takeover. Exploitable via AllowInstanceCreation.
Original description
The description as published by the source.
Incus is a system container and virtual machine manager. Prior to version 7.3.0, when copying an instance across projects, the project restriction check (AllowInstanceCreation) runs BEFORE the source instance's configuration is merged into the request. Dangerous configuration keys (including security.privileged, raw.lxc, raw.apparmor) from the source instance are merged AFTER the check passes, bypassing all project restrictions on the target project. Version 7.3.0 patches the issue.
Source: NIST National Vulnerability Database NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-62941 has been found in Incus.
Attackers can target a specific entry point like AllowInstanceCreation over the network to misuse the product.
Successful exploitation can lead to full system takeover. CVSS score: 9.9/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "Incus CVE-2026-62941" on the vendor's site.
CVE-2026-62941 (Incus) — CWE-863 / CVSS v3 9.9
Attack vector: remote (network-reachable) / no user interaction
Attack surface: AllowInstanceCreation / security.privileged / raw.lxc / raw.apparmor
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
Incorrect authorization (CWE-863) exists in Incus. Attackers reach the vulnerable code path via AllowInstanceCreation.
Check the vendor advisory for the affected versions of Incus. Attack surface: AllowInstanceCreation / security.privileged / raw.lxc / raw.apparmor.
Severity: Critical (CVSS 9.9/10). Successful exploitation can lead to full system takeover.
Update to the patched release per vendor advisory.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'Incus' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'Incus' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
Incusを grep し、稼働しているサービス・バージョンを把握する。 -
2Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Debian DEBIAN-CVE-2026-62941 incus Fixed in: 6.0.4-2+deb13u9
- Ubuntu UBUNTU-CVE-2026-62941 incus
References
- advisory github.com
- advisory github.com
- advisory nvd.nist.gov