CVE-2026-26980 — AI Deep Analysis Summary

Q: What is this vulnerability? (Essence + Consequences)

🚨 **Essence**: Blind SQL Injection in Ghost CMS. 💥 **Consequences**: Unauthenticated attackers can execute arbitrary database reads. Critical risk to data integrity and confidentiality.

Q: Root Cause? (CWE/Flaw)

🛡️ **Root Cause**: CWE-89 (SQL Injection). 🔍 **Flaw**: The `/ghost/api/content/tags/` endpoint accepts the `filter` parameter without proper validation or sanitization.

Q: Who is affected? (Versions/Components)

📦 **Affected**: TryGhost Ghost CMS. 📅 **Versions**: 3.24.0 through 6.19.0. ✅ **Safe**: Version 6.19.1 and above are patched.

Q: What can hackers do? (Privileges/Data)

🕵️ **Attacker Actions**: Read arbitrary data from the database. 🔓 **Privileges**: No authentication required (PR:N). 📊 **Impact**: High Confidentiality & Integrity impact; Low Availability impact.

Q: Is exploitation threshold high? (Auth/Config)

📉 **Threshold**: LOW. 🌐 **Access**: Network accessible (AV:N). 🔑 **Auth**: None required (PR:N). 👁️ **UI**: No user interaction needed (UI:N). 🎯 **Complexity**: Low (AC:L).

Q: Is there a public Exp? (PoC/Wild Exploitation)

🔓 **Exploit**: Yes. 📜 **PoC**: Available via ProjectDiscovery Nuclei templates. 🧪 **Method**: Boolean-based blind SQL injection payload sent to the filter parameter.

Q: How to self-check? (Features/Scanning)

🔍 **Self-Check**: Scan for Ghost CMS versions 3.24.0-6.19.0. 🧪 **Test**: Use Nuclei template `CVE-2026-26980.yaml` to probe the `/ghost/api/content/tags/` endpoint with boolean payloads.

Q: Is it fixed officially? (Patch/Mitigation)

🛠️ **Fix**: Officially patched in **v6.19.1**. 🔗 **Commit**: See GitHub commit `30868d6`. 📢 **Advisory**: GHSA-w52v-v783-gw97.

Q: What if no patch? (Workaround)

🚧 **Workaround**: If patching is impossible, restrict network access to the `/ghost/api/content/tags/` endpoint. 🛡️ **WAF**: Implement strict input filtering for the `filter` parameter to block SQL syntax.

Q: Is it urgent? (Priority Suggestion)

⚡ **Urgency**: HIGH. 🚨 **Priority**: Immediate patching recommended. 📉 **Risk**: CVSS Score indicates High severity with easy exploitation and no auth required.

Updated May 06, 2026 CVSS 9.4 · Critical

This is a summary of the AI-generated 10-question deep analysis. The full version (longer answers, follow-up Q&A, related CVEs) requires login. Read the full analysis →

Q1What is this vulnerability? (Essence + Consequences)

🚨 **Essence**: Blind SQL Injection in Ghost CMS. <br>💥 **Consequences**: Unauthenticated attackers can execute arbitrary database reads. Critical risk to data integrity and confidentiality.

Q2Root Cause? (CWE/Flaw)

🛡️ **Root Cause**: CWE-89 (SQL Injection). <br>🔍 **Flaw**: The `/ghost/api/content/tags/` endpoint accepts the `filter` parameter without proper validation or sanitization.

Q3Who is affected? (Versions/Components)

📦 **Affected**: TryGhost Ghost CMS. <br>📅 **Versions**: 3.24.0 through 6.19.0. <br>✅ **Safe**: Version 6.19.1 and above are patched.

Q4What can hackers do? (Privileges/Data)

🕵️ **Attacker Actions**: Read arbitrary data from the database. <br>🔓 **Privileges**: No authentication required (PR:N). <br>📊 **Impact**: High Confidentiality & Integrity impact; Low Availability impact.

Q5Is exploitation threshold high? (Auth/Config)

📉 **Threshold**: LOW. <br>🌐 **Access**: Network accessible (AV:N). <br>🔑 **Auth**: None required (PR:N). <br>👁️ **UI**: No user interaction needed (UI:N). <br>🎯 **Complexity**: Low (AC:L).

Q6Is there a public Exp? (PoC/Wild Exploitation)

🔓 **Exploit**: Yes. <br>📜 **PoC**: Available via ProjectDiscovery Nuclei templates. <br>🧪 **Method**: Boolean-based blind SQL injection payload sent to the filter parameter.

Q7How to self-check? (Features/Scanning)

🔍 **Self-Check**: Scan for Ghost CMS versions 3.24.0-6.19.0. <br>🧪 **Test**: Use Nuclei template `CVE-2026-26980.yaml` to probe the `/ghost/api/content/tags/` endpoint with boolean payloads.

Q8Is it fixed officially? (Patch/Mitigation)

🛠️ **Fix**: Officially patched in **v6.19.1**. <br>🔗 **Commit**: See GitHub commit `30868d6`. <br>📢 **Advisory**: GHSA-w52v-v783-gw97.

Q9What if no patch? (Workaround)

🚧 **Workaround**: If patching is impossible, restrict network access to the `/ghost/api/content/tags/` endpoint. <br>🛡️ **WAF**: Implement strict input filtering for the `filter` parameter to block SQL syntax.

Q10Is it urgent? (Priority Suggestion)

⚡ **Urgency**: HIGH. <br>🚨 **Priority**: Immediate patching recommended. <br>📉 **Risk**: CVSS Score indicates High severity with easy exploitation and no auth required.

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Vulnerability detail Full AI analysis (login) TryGhost CWE-89