CVE-2026-21391
CriticalCVSS 9.5Summary
An improper validation vulnerability exists in PingAM where a well-crafted request allows arbitrary or protected ID Token claims to be set or overridden. In certain configurations this could allow an attacker to bypass authentication controls via spoofing, leading to privilege escalation or impersonation.
Risk Assessment
An attacker can bypass authentication controls and impersonate another user, gaining unauthorized access or elevated privileges. The risk is high in identity federation environments.
Recommendation
Apply available security updates for PingAM. Verify ID Token claim validation configuration and restrict the ability to override claims.
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Original NVD description (English source)
An improper validation vulnerability exists within PingAM where a well-crafted request allows arbitrary or protected ID Token claims to be set or overridden. In certain configurations this could allow an attacker to bypass authentication controls via spoofing leading to privilege escalation or impersonation.

