CVE-2026-70594: Session Fixation (CVSS 6.7)

Description

Ghost is a Node.js content management system. From 2.2.0 until 6.54.1, 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. This issue is fixed in version 6.54.1.

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CVSS v3.1 Score

6.7

MEDIUM

CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:L

EPSS — Exploit Prediction

0.0016

Probability of exploitation

0.05%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-384 CWE-384

References

Other References

https://github.com/TryGhost/Ghost/commit/6b1c85c30dd0bacb4d5ffe64fc675ac9342d800c https://github.com/TryGhost/Ghost/pull/29634 https://github.com/TryGhost/Ghost/releases/tag/v6.54.1 https://github.com/TryGhost/Ghost/security/advisories/GHSA-7mpp-r37j-x5wh

Frequently Asked Questions

What is CVE-2026-70594? +

Ghost is a Node.js content management system. From 2.2.0 until 6.54.1, 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. This issue is fixed in version 6.54.1. It has a CVSS v3.1 base score of 6.7 (MEDIUM).

How severe is CVE-2026-70594? +

CVE-2026-70594 has a CVSS v3.1 score of 6.7 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0016, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-70594? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2026-70594