# CVE-2026-21391

## Summary

- **CVE ID:** CVE-2026-21391
- **Severity:** CRITICAL
- **CVSS Score:** 9.5 (CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:L/SC:H/SI:H/SA:N)
- **CWE:** CWE-290
- **Published:** Sep 14, 2026
- **Last Modified:** Sep 14, 2026

## Description

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.

## Affected Products

- Ping Identity — PingAM (8.1.0)
- Ping Identity — PingAM (8.0.0)
- Ping Identity — PingAM (7.5.0)
- Ping Identity — PingAM (7.4.0)
- Ping Identity — PingAM (7.3.0)
- Ping Identity — PingAM (7.2.0)
- Ping Identity — PingAM (7.1.0)
- Ping Identity — PingAM (7.0.0)
- Ping Identity — PingAM (0)

## References

- [CNA](https://support.pingidentity.com/s/article/PingAM-Security-Advisory-202603)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.45%
- **EPSS Percentile:** 38.0

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-19._