All vulnerabilities

Servers and applications

GHSA-9wp5-gvxp-8wv6

Denial of Service via Crafted Revue Import

Severity
Medium 6.5
Published
13 Nov 2026
Last changed
13 Nov 2026
Added to UpHeron
13 Nov 2026
Fixed in
6.76.0
Weakness
Regular expression denial of service (ReDoS) (CWE-1333)
Attack
Over the network · No login needed · Needs someone to click or open something
Attacker can
Take it down
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Sources
Project advisories (GitHub)

Description

A crafted Revue export file could make Ghost's Revue importer keep the Ghost process busy for a long time, during which the site stops responding to all visitors and staff.

Revue imports can only be run by an Administrator, so an attacker would need to convince an Administrator to import a crafted file. The effect lasts until processing finishes or Ghost is restarted. No data is exposed or changed.

For self-hosters using Docker, find Docker's official Ghost image here. Updating a Docker-based Ghost instance is documented here.

If your Ghost is a Ghost-CLI install see our documentation on updating it to the latest version here.

From TryGhost/Ghost's security advisory.

Affected software

SoftwareAffected versions
GhostServers and applications · github:tryghost/ghost
  • From 5.26.0 before 6.76.0

References