What is CVE-2026-104413?

CVE-2026-104413 is a high-severity vulnerability in Tryghost Ghost, classified under Cross-site Scripting. CVSS score: 7.3/10. Published 2026-10-02.

How severe is CVE-2026-104413?

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

XSS in Tryghost Ghost

CVE-2026-104413

Ghost from 5.94.0 before 6.64.0 contains a stored cross-site scripting vulnerability that allows staff users, including Contributors, to host arbitrary HTML by abusing bookmark card image fetching. Attackers can create bookmark cards that store non-image files from external websites as icons or thumbnails to compromise other staff users' admin sessions.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2026-10-02.

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

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

github.com/TryGhost/Ghost/security/advisories/GHSA-347q-26qq-h2p6 (vendor-advisory)
www.vulncheck.com/advisories/ghost-5.94.0-before-6.64.0-stored-xss-via-bookmark… (third-party-advisory)

Frequently asked questions

What is CVE-2026-104413?: CVE-2026-104413 is a high-severity vulnerability in Tryghost Ghost, classified under Cross-site Scripting. CVSS score: 7.3/10. Published 2026-10-02.
How severe is CVE-2026-104413?: High severity. CVSS v3 base score is 7.3 out of 10.