CVE-2026-104414

High

Description

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.

SeverityHigh

CVSS8.1

Exploit probability—

Product

Ghost

PublishedOct 2, 2026

First seenOct 2, 2026

Weakness typeCWE-79Cross-site scripting (XSS)

How to fix

Update

ghost6.64.0 or later

Vendor advisories

github.com/TryGhost/Ghost/security/advisories/GHSA-v3xr-g6p2-fvgv

Affected products

Product	Affected versions	Fixed in
ghostnpm	2.5.0 ≤ v < 6.64.0	6.64.0

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