GHSA-9m4w-fmjw-fvjq: ghost (CVE-2026-105645)

Package	Ecosystem	Affected	Fixed in
ghost	npm	>=5.37.0, <6.67.0	6.67.0

Machine-written summary

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

Ghost, the npm package ghost, versions 5.37.0 up to 6.67.0 (fixed in 6.67.0), has a regular expression denial of service flaw in its external media inliner. An attacker who has Administrator access can send a crafted request that causes excessive CPU use and makes the Ghost server unresponsive. To fix it, upgrade to version 6.67.0 or later, using the update documentation linked by the source for Docker or Ghost-CLI installs.

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

CISA KEV Not listed.
EPSS 0.0035, the 28th percentile, on 13 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.