What is CVE-2026-105649?

CVE-2026-105649 is a high-severity vulnerability in Tryghost Ghost, classified under Cross-site Scripting. CVSS score: 7.3/10. Published 2026-10-05.

How severe is CVE-2026-105649?

High severity. CVSS v3 base score is 7.3 out of 10.

XSS in Tryghost Ghost

CVE-2026-105649

Ghost is a Node.js content management system. From 4.22.0 until 6.65.0, SVG media thumbnails and SVG images uploaded with a non-SVG file extension were stored without sanitization. This allowed any staff user, including Contributors, to host scripts on the site's domain, possibly resulting in compromise of other staff users' admin sessions. This issue is fixed in version 6.65.0.

Vulnerability class: XSS (Cross-Site Scripting)

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

CVSS v3 metric

CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N.

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 >= 4.22.0, < 6.65.0

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-105649?: CVE-2026-105649 is a high-severity vulnerability in Tryghost Ghost, classified under Cross-site Scripting. CVSS score: 7.3/10. Published 2026-10-05.
How severe is CVE-2026-105649?: High severity. CVSS v3 base score is 7.3 out of 10.