What is CVE-2026-105645?

CVE-2026-105645 is a medium-severity vulnerability in Tryghost Ghost, classified under Inefficient Regular Expression Complexity. CVSS score: 4.9/10. Published 2026-10-05.

How severe is CVE-2026-105645?

Medium severity. CVSS v3 base score is 4.9 out of 10.

Vulnerability in Tryghost Ghost

CVE-2026-105645

Ghost is a Node.js content management system. From 5.37.0 until 6.67.0, a crafted request to the external media inliner could cause excessive CPU usage, making the Ghost server unresponsive. Exploiting this requires Administrator access. This issue is fixed in version 6.67.0.

Vulnerability class: ReDoS (Regular Expression Denial of Service)

Published 2026-10-05 · last modified 2026-10-06.

CVSS v3 metric

CVSS v3 base score 4.9 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Tryghost Ghost — versions >= 5.37.0, < 6.67.0

Weakness classification (CWE)

CWE-1333 — Inefficient Regular Expression Complexity

References

Frequently asked questions

What is CVE-2026-105645?: CVE-2026-105645 is a medium-severity vulnerability in Tryghost Ghost, classified under Inefficient Regular Expression Complexity. CVSS score: 4.9/10. Published 2026-10-05.
How severe is CVE-2026-105645?: Medium severity. CVSS v3 base score is 4.9 out of 10.