XSS in Tryghost Ghost
CVE-2026-103292
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published .
CVSS v3 metric
CVSS v3 base score 8.0 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H.
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
Weakness classification (CWE)
References
- github.com/TryGhost/Ghost/security/advisories/GHSA-mp9q-4q6m-44f5 (vendor-advisory)
- www.vulncheck.com/advisories/ghost-0.5.3-before-6.50.0-cross-site-scripting-via… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-103292?
- CVE-2026-103292 is a high-severity vulnerability in Tryghost Ghost, classified under Cross-site Scripting. CVSS score: 8.0/10. Published 2026-10-01.
- How severe is CVE-2026-103292?
- High severity. CVSS v3 base score is 8.0 out of 10.