Vulnerability intelligence
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.
CVSS Score
9.8
Critical
EPSS — Exploit Probability
3.9%
Riskier than 89% of all CVEs
Exploitation
Not in CISA KEV
No federal exploitation record
Remediation
unknown
Check vendor advisories
1 article across 1 outlet · first covered Jun 16, 2026 · latest Jun 16, 2026
Coverage timeline
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Critical phpBB OAuth flaw lets hackers hijack any accountsecurityonline.info · Jun 16, 2026