What is CVE-2026-53945?

CVE-2026-53945 is a medium-severity vulnerability in Tryghost Ghost, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 4.0/10. Published 2026-06-24.

How severe is CVE-2026-53945?

Medium severity. CVSS v3 base score is 4.0 out of 10.

SSRF in Tryghost Ghost

CVE-2026-53945

Ghost is a Node.js content management system. From 6.0.9 until 6.21.1, Ghost’s private-IP check for outbound HTTP requests could be bypassed via DNS rebinding, allowing an attacker to coerce the Ghost server into reaching hosts on internal…

Vulnerability class: TOCTOU (Time-of-Check to Time-of-Use)

CVSS v3 metric

CVSS v3 base score 4.0 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N.

Affected products

Tryghost Ghost — versions >= 6.0.9, < 6.21.1

Weakness classification (CWE)

CWE-367 — Time-of-check Time-of-use (TOCTOU) Race Condition
CWE-918 — Server-Side Request Forgery (SSRF)

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-53945?: CVE-2026-53945 is a medium-severity vulnerability in Tryghost Ghost, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 4.0/10. Published 2026-06-24.
How severe is CVE-2026-53945?: Medium severity. CVSS v3 base score is 4.0 out of 10.