CVE-2026-21391
Received Received - Intake

Improper Validation in PingAM Allows Authentication Bypass

Vulnerability report for CVE-2026-21391, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.

Publication date: 2026-09-14

Last updated on: 2026-09-14

Assigner: Ping Identity Corporation

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.

CVSS Scores

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Meta Information

Published
2026-09-14
Last Modified
2026-09-14
Generated
2026-09-15
AI Q&A
2026-09-14
EPSS Evaluated
N/A
NVD
EUVD

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
pingidentity pingam *

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-290 This attack-focused weakness is caused by incorrectly implemented authentication schemes that are subject to spoofing attacks.

Attack-Flow Graph

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Executive Summary

This vulnerability in PingAM involves improper validation of requests, allowing attackers to set or override protected ID Token claims. This can lead to bypassing authentication controls, enabling privilege escalation or impersonation attacks.

Detection Guidance

Detection requires reviewing PingAM logs for unusual ID Token claims or authentication bypass attempts. Check for requests modifying protected claims or unexpected privilege escalation events. No specific commands are provided in the available resources.

Impact Analysis

An attacker could exploit this to gain unauthorized access to systems, escalate privileges, or impersonate legitimate users. This may result in data breaches, unauthorized actions, or compromised user accounts.

Compliance Impact

This vulnerability could lead to unauthorized access or data breaches, violating compliance requirements for GDPR, HIPAA, and other regulations. It may result in legal penalties, loss of trust, and reputational damage.

Mitigation Strategies

Apply the latest security patch from Ping Identity immediately. Review and update authentication controls to ensure proper validation of ID Token claims. Monitor network traffic for unusual authentication requests or privilege escalation attempts.

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