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CVE-2026-70588 medium CVSS 5.0

Cross-Site Scripting (XSS) in ghost (CVE-2026-70588)

Summary

cross-site scripting in ghost (CVE-2026-70588). Data can be tampered with by attackers. Mitigation: upgrade to `6.54.1` or later.

AI summary snake-internal / snake-material-v2

A vulnerability tracked as **CVE-2026-70588** has been found in ghost. Data can be tampered with by attackers. CVSS score: 5.0/10. What to do: upgrade ghost to **6.54.1** or later. If unsure, ask your IT team or search "ghost CVE-2026-70588" on the vendor's site.
CVE-2026-70588 (ghost) — CWE-79 / CVSS v3 5.0 Attack vector: remote (network-reachable) / no user interaction Patched: `6.54.1` — apply immediately Workaround: If upgrading immediately is not possible, avoid using the Universal Import feature. 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
**Cross-site scripting (XSS)** (CWE-79) exists in ghost.
📍 Affected scope
ghost — .
🔥 Severity
Severity: Medium (CVSS 5.0/10). Data can be tampered with by attackers
🔧 How to fix
Update to **6.54.1**.
🛡️ Workaround
Workaround: If upgrading immediately is not possible, avoid using the Universal Import feature.
🔍 Detection
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run `grep -r 'ghost' .` against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.

Response Actions (7 steps)

Concrete steps and command examples for SOC/SRE teams to execute in order

  1. 1
    Identify exposure identify 
    grep -r 'ghost' . | 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 `ghost` を grep し、稼働しているサービス・バージョンを把握する。

  2. 5
    Apply temporary workaround mitigate 
    If upgrading immediately is not possible, avoid using the Universal Import feature.

    パッチが適用されるまでの応急処置として、If upgrading immediately is not possible, avoid using the Universal Import feature. を実施。回避策の副作用 (機能低下) を確認した上で。

  3. 6
    Apply patch patch 
    Upgrade ghost to 6.54.1

    ステージング環境で 6.54.1 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 3 で見つけた異常検知の続報チェックを含めること。

  4. 7
    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 Step 3 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

npm ghost
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.54.1"}]}]

References

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