What is CVE-2026-104414?

CVE-2026-104414 is a high-severity vulnerability in Tryghost Ghost, classified under Cross-site Scripting. CVSS score: 8.1/10. Published 2026-10-02.

How severe is CVE-2026-104414?

High severity. CVSS v3 base score is 8.1 out of 10.

XSS in Tryghost Ghost

CVE-2026-104414

Ghost from 2.5.0 before 6.64.0 contains a stored cross-site scripting vulnerability that allows attackers to inject untrusted scripts into post content via oEmbed photo responses. Attackers can host malicious oEmbed photo responses so that embedding their URL stores scripts that run in the Ghost editor, published site, and newsletter emails, compromising staff admin sessions.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2026-10-02 · last modified 2026-10-02.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/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-v3xr-g6p2-fvgv (vendor-advisory)
www.vulncheck.com/advisories/ghost-from-2.5.0-before-6.64.0-stored-xss-via-oemb… (third-party-advisory)

Frequently asked questions

What is CVE-2026-104414?: CVE-2026-104414 is a high-severity vulnerability in Tryghost Ghost, classified under Cross-site Scripting. CVSS score: 8.1/10. Published 2026-10-02.
How severe is CVE-2026-104414?: High severity. CVSS v3 base score is 8.1 out of 10.