CVE-2026-12426 Members <= 3.2.22 - Unauthenticated Sensitive Information Disclosure via REST API Pagination Side Channel
Unauthenticated attackers can infer the existence, count, and content of restricted posts via a REST API pagination side channel in the Members plugin.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-12426?
CVE-2026-12426 is a medium-severity vulnerability in supercleanse Members – Membership & User Role Editor Plugin, published on 11 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The Members – Membership & User Role Editor Plugin plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 3.2.22 via the members_filter_protected_posts_for_rest. This makes it possible for unauthenticated attackers to extract determine the existence and exact count of access-restricted posts, and use per-page pagination as a boolean oracle to infer keywords and content contained within those hidden restricted posts.
Weakness: CWE-200
Which versions are affected by CVE-2026-12426?
How do I fix CVE-2026-12426?
No fix has been published for CVE-2026-12426 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-12426 being exploited?
There is no known exploitation of CVE-2026-12426 in the wild and no public exploit code.
Sources
Also known as GHSA-5xr4-65q6-7jp8.