Vulnerability in github.com/lxc/incus/v7/cmd/incusd (CVE-2026-48755)
Summary
Vulnerability in github.com/lxc/incus/v7/cmd/incusd (CVE-2026-48755). Successful exploitation can lead to full system takeover. Exploitable via compression_algorithm. 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 7.1.0, improper validation of user-provided backup compression algorithm leads to argument injection in the constructed command line. This leads to an arbitrary file write on the host, possibly leading to arbitrary command execution. Version 7.1.0 patches the issue.
Source: GitHub Security Advisories (Global) 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-2026-48755 has been found in github.com/lxc/incus/v7/cmd/incusd.
Attackers can target a specific entry point like compression_algorithm over the network to misuse the product.
Successful exploitation can lead to full system takeover. CVSS score: 9.9/10.
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-2026-48755" on the vendor's site.
CVE-2026-48755 (github.com/lxc/incus/v7/cmd/incusd) — CWE-20 / CVSS v3 9.9
Attack vector: remote (network-reachable) / no user interaction
Attack surface: compression_algorithm / zstd
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-20) exists in github.com/lxc/incus/v7/cmd/incusd. Attackers reach the vulnerable code path via compression_algorithm.
Check the vendor advisory for the affected versions of github.com/lxc/incus/v7/cmd/incusd. Attack surface: compression_algorithm / zstd.
Severity: Critical (CVSS 9.9/10). Successful exploitation can lead to full system takeover.
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/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
-
1Identify 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。 -
2Apply 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-2026-48755 incus Fixed in: 6.0.4-2+deb13u8
- Ubuntu UBUNTU-CVE-2026-48755 lxd
References
- advisory github.com
- advisory github.com
- advisory nvd.nist.gov
- package github.com
- web github.com