CVE-2026-103292

High

Description

Ghost versions from 0.5.3 through versions prior to 6.50.0 fail to sanitize the data placed in the JSON-LD HTML tag emitted by the {{ghost_head}} helper. An authenticated user with limited privileges can inject unescaped content that is rendered as script in the published page, potentially leading to compromise of a staff user's admin session when that user views the affected page.

SeverityHigh

CVSS8.0

Exploit probability—

Product

Ghost

PublishedOct 1, 2026

First seenOct 1, 2026

Weakness typeCWE-79Cross-site scripting (XSS)

How to fix

Update

TryGhost Ghost6.50.0 or later

Vendor advisories

github.com/TryGhost/Ghost/security/advisories/GHSA-mp9q-4q6m-44f5

Affected products

Product	Affected versions	Fixed in
TryGhost Ghost	0.5.3 ≤ v < 6.50.0	6.50.0

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