What is CVE-2026-103289?

CVE-2026-103289 is a medium-severity vulnerability in Tryghost Ghost, classified under Improper Neutralization of Special Elements in Data Query Logic. CVSS score: 6.5/10. Published 2026-10-01.

How severe is CVE-2026-103289?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Tryghost Ghost

CVE-2026-103289

Ghost from 5.9.0 before 6.44.1 contains an input validation issue in the comments feature that allows authenticated members to access comments they are not authorized to view, resulting in disclosure of restricted comment data.

Published 2026-10-01.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/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-943 — Improper Neutralization of Special Elements in Data Query Logic

References

github.com/TryGhost/Ghost/security/advisories/GHSA-6q6j-f24j-p477 (vendor-advisory)
www.vulncheck.com/advisories/ghost-5.9.0-before-6.44.1-authorization-bypass-via… (third-party-advisory)

Frequently asked questions

What is CVE-2026-103289?: CVE-2026-103289 is a medium-severity vulnerability in Tryghost Ghost, classified under Improper Neutralization of Special Elements in Data Query Logic. CVSS score: 6.5/10. Published 2026-10-01.
How severe is CVE-2026-103289?: Medium severity. CVSS v3 base score is 6.5 out of 10.