VulnerabilityDeferred

CVE-2026-48611

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.

CRITICAL 9.8EPSS 3.86%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (3.86%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

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.

CVSS 3.0: 9.8 CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS: 3.86% probability · 90th percentile
CISA KEV: Not listed
Weakness: CWE-287
Source: support@hackerone.com

References

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

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.