9.5

CVE-2026-21391: ping identity pingam Authentication Bypass by Spoofing

CVSS: 9.5v4.0CriticalAwaiting analysis
Published 14-09-2026Last modified 14-09-2026
Open JSON

Vulnerability summary

CVE-2026-21391 is a critical (CVSS 9.5) Authentication Bypass by Spoofing vulnerability in ping identity pingam. EPSS estimates a 0.45% chance of exploitation in the next 30 days, higher than 37.4% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.5/10
010
Critical · v4.0 (CVE.org)
EPSS score
0.45%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 14-09-2026
    PublishedVulnerability first disclosed.
  2. 14-09-2026
    Last modifiedVulnerability information updated.

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 metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.45%

Chance of exploitation in the next 30 days

Percentile

37%

Versus all other CVEs

30-day change

0.00 pp

From 0.45% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.45%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ping identity1 product
  • pingam8.1.0 | ≥ 8.0.0, ≤ 8.0.2 | ≥ 7.5.0, ≤ 7.5.2 | ≥ 7.4.0, ≤ 7.4.2 | ≥ 7.3.0, ≤ 7.3.3 | ≥ 7.2.0, ≤ 7.2.2 | ≥ 7.1.0, ≤ 7.1.4 | ≥ 7.0.0, ≤ 7.0.2 | < 7.0.0

1 vendor · 1 product

References

1 links