CVE-2026-48611

CVE

Threat entity extracted from intelligence sources

Frequency

occurrences

First Seen

June 12, 2026

Last Seen

June 12, 2026

API

Exploited in Wild

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Ransomware Use

—

Public Exploits

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Attack Vector

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Vulnerability Overview

Exploitation Activity

Exploitation Intelligence

Critical CVE-2026-48611 Vulnerability Allows OAuth Account Hijacking78.8

CVE-2026-48611 has been identified as a critical vulnerability due to improper authentication checks in OAuth implementations, allowing account hijacking even when OAuth is disabled. This flaw affects default installations of phpBB versions below 3.3.16, enabling unauthenticated attackers to gain un...