Vulnerability in github.com/lxc/incus/v7 (CVE-2026-55621)
Summary
Vulnerability in github.com/lxc/incus/v7 (CVE-2026-55621). Confidential information can be exposed externally. Exploitable via req.Source.Project. Mitigation: upgrade to 7.2.0 or later.
Original description
The description as published by the source.
Incus is a system container and virtual machine manager. Prior to version 7.2.0, missing authorization checks exist for custom volume copying where an attacker knowing the name of a project that they don't have access to and the name of a custom volume in that project can copy the custom volume to a new project. This issue could allow an attacker to access secrets in custom volumes they are not authorized to access. Version 7.2.0 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-2026-55621 has been found in github.com/lxc/incus/v7.
Attackers can target a specific entry point like req.Source.Project over the network to misuse the product.
Confidential information can be exposed externally. CVSS score: 7.7/10.
What to do: upgrade github.com/lxc/incus/v7 to 7.2.0 or later.
If unsure, ask your IT team or search "github.com/lxc/incus/v7 CVE-2026-55621" on the vendor's site.
CVE-2026-55621 (github.com/lxc/incus/v7) — CWE-284 / CVSS v3 7.7
Attack vector: remote (network-reachable) / no user interaction
Attack surface: req.Source.Project / CreateCustomVolumeFromCopy / allowPermission / CanView
Patched: 7.2.0 — apply immediately
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.
A vulnerability (CWE-284) exists in github.com/lxc/incus/v7. Attackers reach the vulnerable code path via req.Source.Project.
Check the vendor advisory for the affected versions of github.com/lxc/incus/v7. Attack surface: req.Source.Project / CreateCustomVolumeFromCopy / allowPermission / CanView.
Severity: High (CVSS 7.7/10). Confidential information can be exposed externally.
Update to 7.2.0.
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 'github.com/lxc/incus/v7' . 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
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1Identify exposure identify
grep -r 'github.com/lxc/incus/v7' . | 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
github.com/lxc/incus/v7を grep し、稼働しているサービス・バージョンを把握する。 -
2Apply patch patch
Upgrade github.com/lxc/incus/v7 to 7.2.0ステージング環境で 7.2.0 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
-
3Post-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。
Affected packages
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Debian DEBIAN-CVE-2026-55621 incus Fixed in: 6.0.4-2+deb13u8
- Ubuntu UBUNTU-CVE-2026-55621 lxd
References
- advisory github.com
- advisory nvd.nist.gov
- advisory github.com
- package github.com
- web github.com
- web github.com
- web github.com