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CVE-2026-55622 high CVSS 7.7

Vulnerability in github.com/lxc/incus/v7/cmd/incusd (CVE-2026-55622)

Summary

Vulnerability in github.com/lxc/incus/v7/cmd/incusd (CVE-2026-55622). Confidential information can be exposed externally. Exploitable via POST /1.0/instances. 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 instance copying where an attacker knowing the name of a project that they don't have access to and the name of an instance in that project can copy the instance to a new project. This issue could allow an attacker to access secrets in instances 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-2026-55622 has been found in github.com/lxc/incus/v7/cmd/incusd.
Attackers can target a specific entry point like POST /1.0/instances 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/cmd/incusd to 7.2.0 or later.
If unsure, ask your IT team or search "github.com/lxc/incus/v7/cmd/incusd CVE-2026-55622" on the vendor's site.

CVE-2026-55622 (github.com/lxc/incus/v7/cmd/incusd) — CWE-284 / CVSS v3 7.7
Attack vector: remote (network-reachable) / no user interaction
Attack surface: POST /1.0/instances / req.Source.Project / secret / default
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.

❓ What is the problem

A vulnerability (CWE-284) exists in github.com/lxc/incus/v7/cmd/incusd. Attackers reach the vulnerable code path via POST /1.0/instances.

📍 Affected scope

Check the vendor advisory for the affected versions of github.com/lxc/incus/v7/cmd/incusd. Attack surface: POST /1.0/instances / req.Source.Project / secret / default.

🔥 Severity

Severity: High (CVSS 7.7/10). Confidential information can be exposed externally.

🔧 How to fix

Update to 7.2.0.

🛡️ Workaround

Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.

🔍 Detection

Search webserver/proxy logs for unusual POST /1.0/instances requests with malformed payloads or SQL meta-characters. Run grep -r 'github.com/lxc/incus/v7/cmd/incusd' . 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

  1. 1
    Identify exposure identify 
    grep -r 'github.com/lxc/incus/v7/cmd/incusd' . | 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/cmd/incusd を grep し、稼働しているサービス・バージョンを把握する。

  2. 2
    Hunt for indicators of compromise detect 
    grep 'POST /1.0/instances' /var/log/nginx/access.log | grep -E '(unusual_payload|sqli_pattern)'

    アクセスログで POST /1.0/instances への異常なリクエスト (不正な認証ヘッダ・SQLメタ文字)を過去 30〜90日分捜索。WAF/SIEM があれば該当パスのアラート発火履歴を確認。

  3. 3
    Apply patch patch 
    Upgrade github.com/lxc/incus/v7/cmd/incusd 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と、Step 2 で見つけた異常検知の続報チェックを含めること。

  4. 4
    Post-deployment verification verify 
    Replay attack against POST /1.0/instances on staging to confirm patch closes the vector

    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 Step 2 と同じログクエリでアラート再発が無いか継続監視。

Affected packages

go github.com/lxc/incus/v7/cmd/incusd
[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"7.2.0"}]}]
Go github.com/lxc/incus
[{"type":"SEMVER","events":[{"introduced":"0"}]}]
Go github.com/lxc/incus/v6
[{"type":"SEMVER","events":[{"introduced":"0"}]}]
Go github.com/lxc/incus/v7
[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"7.2.0"}]}]

Fix status by distribution

Fixed packages published by each distribution for this CVE

References

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