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CVE-2026-54182 high CVSS 8.1

Vulnerability in backpack/crud (CVE-2026-54182)

Summary

Vulnerability in backpack/crud (CVE-2026-54182). Successful exploitation can lead to full system takeover. Exploitable via Host header. Mitigation: upgrade to 7.0.36 or later.

Original description

The description as published by the source.

Summary

Backpack\CRUD\Stats::makeCurlRequest builds a shell command using unescaped input that originates from the HTTP Host header, then passes it to exec(). A specially crafted Host header can break out of the shell argument and cause the server to execute arbitrary OS commands as the web user.

The vulnerable code path is reached from BackpackServiceProvider::boot() on every HTTP request in production when exec() and curl are available. A 1-in-100 random gate is the only guard — an attacker can reliably trigger it by retrying.

Severity

High — CVSS 8.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Complexity is rated High because default nginx and Apache configurations typically strip or reject malformed Host headers before they reach PHP, and exec() is often disabled for web processes in hardened environments. Both mitigations must be absent for exploitation.

Impact

A successful exploit yields OS command execution as the web server user (www-data, nginx, etc.), giving an unauthenticated attacker access to environment secrets (APP_KEY, database credentials, API keys in .env), the filesystem, and any service the server can reach.

Fix

makeCurlRequest was replaced with the Guzzle-based path already present in the codebase, eliminating the shell-command construction entirely. Upgrade to a patched release immediately.

Affected versions

| Branch | Vulnerable range | First safe version |
|--------|---------------…

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-2026-54182 has been found in backpack/crud.
Attackers can target a specific entry point like Host header over the network to misuse the product.
Successful exploitation can lead to full system takeover. CVSS score: 8.1/10.
What to do: upgrade backpack/crud to 7.0.36 or later.
If unsure, ask your IT team or search "backpack/crud CVE-2026-54182" on the vendor's site.

CVE-2026-54182 (backpack/crud) — CWE-20 / CVSS v3 8.1
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Attack surface: Host header / Host / curl / nginx
Patched: 7.0.36 — 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-20) exists in backpack/crud. Attackers reach the vulnerable code path via Host header without authentication.

📍 Affected scope

Check the vendor advisory for the affected versions of backpack/crud. Attack surface: Host header / Host / curl / nginx.

🔥 Severity

Severity: High (CVSS 8.1/10). Successful exploitation can lead to full system takeover.

🔧 How to fix

Update to 7.0.36.

🛡️ 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 request patterns matching this CVE's known IOCs. Run grep -r 'backpack/crud' . 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 'backpack/crud' . | 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 backpack/crud 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
    Apply patch patch 
    Upgrade backpack/crud to 7.0.36

    ステージング環境で 7.0.36 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。

  3. 3
    Post-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

composer backpack/crud
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.0.36"}]}]
Packagist backpack/crud
[{"type":"ECOSYSTEM","events":[{"introduced":"7.0.0"},{"fixed":"7.0.36"}]}]

References

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