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CVE-2026-70590
medium
CVSS 4.8
Information Disclosure in ghost (CVE-2026-70590)
Summary
vulnerability in ghost (CVE-2026-70590). 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-2026-70590** has been found in ghost.
Data can be tampered with by attackers. CVSS score: 4.8/10.
What to do: upgrade ghost to **6.54.1** or later.
If unsure, ask your IT team or search "ghost CVE-2026-70590" on the vendor's site.
CVE-2026-70590 (ghost) — CWE-200 / CVSS v3 4.8
Attack vector: remote (network-reachable)
Patched: `6.54.1` — apply immediately
Workaround: If upgrading immediately is not possible, ensure all staff users have [Multi-factor Authentication](https://docs.ghost.org/security#email-2fa) (MFA) enabled.
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
**information disclosure** (CWE-200) exists in ghost.
📍 Affected scope
ghost — .
🔥 Severity
Severity: Medium (CVSS 4.8/10). Data can be tampered with by attackers
🔧 How to fix
Update to **6.54.1**.
🛡️ Workaround
Workaround: If upgrading immediately is not possible, ensure all staff users have [Multi-factor Authentication](https://docs.ghost.org/security#email-2fa) (MFA) enabled.
🔍 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
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1Identify 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。
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5Apply temporary workaround mitigate
If upgrading immediately is not possible, ensure all staff users have [Multi-factor Authentication](https://docs.ghost.org/security#email-2fa) (MFA) enabled.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, ensure all staff users have [Multi-factor Authentication](https://docs.ghost.org/security#email-2fa) (MFA) enabled. を実施。回避策の副作用 (機能低下) を確認した上で。
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6Apply 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。
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7Post-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"}]}]