CVE-2026-48611 CRITICAL

CVE-2026-48611

Vendor Phpbb
Product phpBB
Weakness CWE-287 · Improper authentication
Published June 12, 2026
Last update June 12, 2026
View on NVD All CVEs

CVSS base score

9.8/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

What the vulnerability does

01Description

Improper authentication checks in the OAuth implementation allow account hijacking even when OAuth is not configured or enabled leading to unauthorized access in default installations.

Key dates

02Disclosure timeline

June 12, 2026 CVE published
June 12, 2026 Record updated