CVE-2026-48612

8HIGH

Key Information:

Vendor

PHPbb

Status
PHPbb
Vendor
CVE Published:
12 June 2026

What is CVE-2026-48612?

Improper state verification in the OAuth implementation could allow an attacker to manipulate the authentication flow and cause a victim’s account to be linked to an attacker-controlled account. This can result in unauthorized account linking and potential account takeover.

Affected Version(s)

phpBB 3.3.0 <= 3.3.16

References

https://www.phpbb.com/community/viewtopic.php?t=2672170

CVSS V3.0

Score:
8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
Low
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.