high7.5
CVE-2026-53950
@tryghost/activitypub is Ghost’s social/federation client app.
Impact
@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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | @tryghost/activitypub | < 3.1.0 | 3.1.0 |