CVE-2026-3906
WordPress core is vulnerable to unauthorized access in versions 6.9 through 6.9.1.
Impact
WordPress core is vulnerable to unauthorized access in versions 6.9 through 6.9.1. The Notes feature (block-level collaboration annotations) was introduced in WordPress 6.9 to allow editorial comments directly on posts in the block editor. However, the REST API `create_item_permissions_check()` method in the comments controller did not verify that the authenticated user has `edit_post` permission on the target post when creating a note. This makes it possible for authenticated attackers with Subscriber-level access to create notes on any post, including posts authored by other users, private posts, and posts in any status.
Affected products
| Product | Affected versions |
|---|---|
| Versions 6.9 | through 6.9.1. |
Versions were read from the advisory text. No structured product data has been published for this record yet.