Vulnerability · Published Aug 5, 2026 · Assigned by GitHub_M

CVE-2026-70596Ghost: Cross-Site Scripting in Feature Image Captions

Medium 4.3

In plain English

A medium-severity cross-site scripting in Ghost from TryGhost. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 25% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)4.3Medium

Exploit odds (30 days)0.3%top 75.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Ghost is a Node.js content management system. From 4.9.0 until 6.54.1, an input validation issue allowed any staff user to create a post with content in feature_image_caption that could be used to hijack another staff user's Ghost Admin session, resulting in privilege escalation. This issue is fixed in 6.54.1.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	ghost	6.54.1	GHSA-pr22-p9rp-2cqv

Affected products (as reported)

Vendor	Product	Versions
TryGhost	Ghost	>= 4.9.0, < 6.54.1

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:L

References

https://github.com/TryGhost/Ghost/security/advisories/GHSA-pr22-p9rp-2cqv x_refsource_CONFIRM
https://github.com/TryGhost/Ghost/pull/29635 x_refsource_MISC
https://github.com/TryGhost/Ghost/commit/a8bea3a4ceec4c852b880f4885119453c3d8588e x_refsource_MISC
https://github.com/TryGhost/Ghost/releases/tag/v6.54.1 x_refsource_MISC