CVE-2026-55987

HIGH CVSS 3.1: 8.1 EPSS 0.29%
Updated Aug 14, 2026
OAuth2
Parameter Value
CVSS 8.1 (HIGH)
Type CWE-863 (Incorrect Authorization)
Vendor OAuth2
Public PoC No

OAuth2 sign-in reactivates an administrator-deactivated account on auth sources without refresh tokens (incomplete fix of #38009)

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
None
No disruption

CVSS Vector v3.1