CVE-2026-70590 TryGhost CVE debrief

Who should care

Ghost administrators and users with staff-level access should verify and apply the patch, and monitor for suspicious activity. They should also review user accounts, implement additional security measures, and track exceptions and retest remediated assets. Security teams and vulnerability management teams should also be aware of the potential impact and take necessary actions to prevent exploitation.

Why it matters

CVE-2026-70590 allows staff-level users to leak hashed passwords of other staff users via the Ghost Admin API, potentially leading to account takeover if an offline password-guessing attack is successful.

• Verify patch application to prevent password leaks
• Monitor user accounts for suspicious activity
• Implement additional security measures for staff-level users

Technical summary

A vulnerability in the Ghost content management system allowed staff-level users to leak hashed passwords of other staff users through the Ghost Admin API prior to version 6.54.1. The issue is fixed in version 6.54.1. An offline password-guessing attack could lead to account takeover if successful, but Device Verification should prevent login with a recovered password. Leaked hashes may have incorrect casing for all characters, increasing the difficulty of a password-guessing attack. The vulnerability has been addressed, and users are advised to apply the patch.

Defensive priority

Medium priority for Ghost administrators to verify and apply the patch.

Recommended defensive actions

• Verify Ghost version and apply patch to 6.54.1 if necessary
• Review user accounts and monitor for suspicious activity
• Implement additional security measures for staff-level users
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and NVD detail page provide information on the vulnerability and its fix. However, the exact scope of affected users and systems requires further verification and defensive review of system logs and user activity for potential exploitation attempts. Additional security measures, such as implementing Device Verification, should be considered to prevent account takeover.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.