Vulnerability · Published Sep 14, 2026 · Assigned by Ping Identity
CVE-2026-21391Improper Claim Validation in PingAM OIDC Provider
Critical 9.5
In plain English
A critical-severity authentication bypass by spoofing in PingAM from Ping Identity. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 48% of all known vulnerabilities).
Severity (CVSS 4.0)9.5Critical
Exploit odds (30 days)0.6%top 52.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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 (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Ping Identity | PingAM | 8.1.08.0.0 – through 8.0.27.5.0 – through 7.5.27.4.0 – through 7.4.27.3.0 – through 7.3.37.2.0 – through 7.2.27.1.0 – through 7.1.47.0.0 – through 7.0.2 |
Weakness: CWE-290 · Vector: 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