What is CVE-2026-86709?

CVE-2026-86709 is a critical-severity vulnerability in The Pressengine, classified under Improper Authentication. CVSS score: 9.8/10. Published 2026-09-17.

How severe is CVE-2026-86709?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Auth bypass in The Pressengine

CVE-2026-86709

The Pressengine WordPress plugin through 1.0 does not stop its login handler from issuing a session when authentication fails, allowing unauthenticated attackers to log in as any user, including administrators.

Vulnerability class: Broken Authentication

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Unknown The Pressengine

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

contact@wpscan.com (technical-description, exploit, vdb-entry)

Frequently asked questions

What is CVE-2026-86709?: CVE-2026-86709 is a critical-severity vulnerability in The Pressengine, classified under Improper Authentication. CVSS score: 9.8/10. Published 2026-09-17.
How severe is CVE-2026-86709?: Critical severity. CVSS v3 base score is 9.8 out of 10.