EUVD-2026-52978
GHSA-7mpp-r37j-x5wh
Severity by source
AV:A/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:L
AV:A and AC:H reflect the mandatory prerequisite same-domain vulnerability; UI:R required as victim must log in; PR:N since attacker is unauthenticated; C:H/I:H for full admin session takeover.
Primary rating from Vendor (https://github.com/TryGhost/Ghost).
CVSS VectorVendor: https://github.com/TryGhost/Ghost
CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:L
Lifecycle Timeline
2DescriptionCVE.org
Impact
Ghost Admin did not invalidate existing sessions on login which could have allowed for session fixation attacks. Successful exploitation would have required another vulnerability on the same domain where Ghost Admin was hosted.
Vulnerable versions
This vulnerability is present in Ghost from v2.2.0 to v6.54.0.
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.
References
Ghost thanks meifukun for disclosing this vulnerability responsibly.
For more information
If you have any questions or comments about this advisory, email Ghost at [security@ghost.org](mailto:security@ghost.org).
AnalysisAI
Session fixation in Ghost Admin (v2.2.0-v6.54.0) allows an attacker who can plant a known session identifier in a victim's browser - via a secondary vulnerability on the same domain - to hijack an authenticated Ghost Admin session after the victim logs in. The root cause is that Ghost Admin's login flow did not call session regeneration, leaving the pre-login session ID valid post-authentication. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires two conditions to be satisfied simultaneously. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 score of 6.7 with vector AV:A/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:L appropriately reflects the chained nature of this attack. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade to Ghost v6.54.1 or later, which introduces session regeneration on login via req.session.regenerate() in session-service.js (patch commit 6b1c85c30dd0bacb4d5ffe64fc675ac9342d800c, PR #29634). … Detailed patch versions, workarounds, and compensating controls in full report. |
Threat intelligence, references, and detailed analysis are available after sign-in.
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External POC / Exploit Code
Leaving vuln.today