Resource exhaustion in Really Simple Security
CVE-2026-88798
The Really Simple Security WordPress plugin before 9.8.3 does not validate a client-supplied address value before using it as a storage key in one of its own options, allowing unauthenticated attackers to grow that option without bound and to slow the site's handling of missing pages.
Vulnerability class: DoS (Denial of Service)
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
Affected products
- Unknown Really Simple Security
Weakness classification (CWE)
References
- contact@wpscan.com (technical-description, exploit, vdb-entry)
Frequently asked questions
- What is CVE-2026-88798?
- CVE-2026-88798 is a medium-severity vulnerability in Really Simple Security, classified under Uncontrolled Resource Consumption. CVSS score: 5.3/10. Published 2026-09-18.
- How severe is CVE-2026-88798?
- Medium severity. CVSS v3 base score is 5.3 out of 10.