GHSA-r7f2-6fj8-6fg2: ghost (CVE-2026-105648)

Package	Ecosystem	Affected	Fixed in
ghost	npm	>=6.0.9, <6.65.0	6.65.0

Machine-written summary

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

Ghost (npm package ghost) versions from 6.0.9 up to 6.65.0 (exclusive) are affected, with the fix in 6.65.0. A validation flaw let an unauthenticated user, through features such as Webmentions, make limited HTTP requests to hosts on the server's internal network under some network configurations, though no response data is returned to the attacker. Upgrade to Ghost 6.65.0 or later.

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
4.0	Medium	3.1	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N	CNA (GitHub_M)

CISA KEV Not listed.
EPSS 0.0030, the 22nd 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.