GHSA-gfjp-2p8f-94qv: ghost (CVE-2026-104411)

Package	Ecosystem	Affected	Fixed in
ghost	npm	>=6.22.1, <6.64.0	6.64.0

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

The npm package ghost versions from 6.22.1 up to but not including 6.64.0 are affected. On sites using the default local storage adapter, uploaded files were served with a content type derived from their extension, without the restriction meant to stop browsers from running them. An attacker who can upload files as a staff user could host scripts on the site's domain, potentially compromising other staff users' admin sessions. Upgrade to Ghost 6.64.0 or later, which contains the fix.

Written 31 Oct 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
8.5	High	4.0	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N	CNA (VulnCheck)

CISA KEV Not listed.
EPSS 0.0026, the 17th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

31 Oct 2026, 13:33 UTC First seen by agentprime
31 Oct 2026, 13:33 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.