CVE-2026-53950
@tryghost/activitypub: XSS in Ghost's ActivityPub client
7.5
HIGH
CVSS 3.1
EPSS 0.20%
Description
@tryghost/activitypub is Ghost’s social/federation client app. Prior to 3.1.0, the ActivityPub client in Ghost was vulnerable to JavaScript injection on posts shared by a maliciously customised ActivityPub server. This vulnerability is fixed in 3.1.0.
How to fix CVE-2026-53950
To remediate CVE-2026-53950, upgrade the affected package to a fixed version below.
- —upgrade to 3.1.0 or later
Is CVE-2026-53950 being exploited?
Low — EPSS is 0.2%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 3.1.0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H |