CVE-2026-21391CWE-290

CVE-2026-21391

published September 14, 2026

CVSS
9.5
EPSS
0%
Percentile
37.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS
9.5 · NONE
CVSS v4.0
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
EPSS
0.00446 · 37.8th percentile
Weakness
CWE-290 · Authentication Bypass by Spoofing
Published
2026-09-14T16:17Z
References (1)
EPSS history
Timeline
  • 16 SEP 04:25Z
    EPSS moved — → 0%
    epss
  • 14 SEP 11:18Z
    Improper Claim Validation in PingAM OIDC Provider
    cvelistv5