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.
Original description
The description as published by the source.
Impact
Any staff-level user was able to leak the hashed passwords of other staff users. An offline password-guessing attack against the hashes could lead to account takeover if successful, but Device Verification should have prevented an attacker from logging in with a recovered password. Depending on the database used, leaked hashes may not have had the correct casing for all characters, increasing the difficulty of a password-guessing attack.
Vulnerable versions
This vulnerability is present in Ghost versions v6.54.0 and earlier.
Patches
v6.54.1 contains a fix for this issue.
How to update
For self-hosters using Docker, find Docker's official Ghost image here. Updating a Docker-based Ghost instance is documented here.
If your Ghost is a Ghost-CLI install see our documentation on updating it to the latest version here.
Workarounds
If upgrading immediately is not possible, ensure all staff users have Multi-factor Authentication (MFA) enabled. This will help prevent an attacker from logging in with any passwords that are successfully recovered from the leaked hashes.
References
Ghost thanks Chapman Schleiss for disclosing this vulnerability responsibly.
For more information
If you have any questions or comments ab…
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-2026-70590 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 (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.
Information disclosure (CWE-200) exists in ghost.
Check the vendor advisory for the affected versions of ghost.
Severity: Medium (CVSS 4.8/10). Data can be tampered with by attackers.
Update to 6.54.1.
Workaround: If upgrading immediately is not possible, ensure all staff users have Multi-factor Authentication (MFA) enabled.
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
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。 -
2Apply 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 (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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3Apply 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を含めること。
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4Post-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
References
- package github.com
- web github.com
- web github.com
- web github.com
- web github.com
- web github.com
- web nvd.nist.gov