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CVE-2026-21391

Improper Claim Validation in PingAM OIDC Provider

Critical9.5EPSS 0.58%
Published
Updated
Reserved
Assigned by
Ping Identity

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.

Scores

CVSS scores of CVE-2026-21391, by who scored it
Scored byCVSSScoreVector
Ping IdentityCNA (assigner)4.0Critical9.5CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:L/SC:H/SI:H/SA:N
NVDNVD · Awaiting Analysis4.0Critical9.5CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:L/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS (exploitation in 30 days)
0.58% · top 52% of all CVEs (6 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: total
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.5.

Weakness

Affected products

  • Ping Identity · PingAM

    • affected 8.1.0
    • affected 8.0.0 – ≤ 8.0.2
    • affected 7.5.0 – ≤ 7.5.2
    • affected 7.4.0 – ≤ 7.4.2
    • affected 7.3.0 – ≤ 7.3.3
    • affected 7.2.0 – ≤ 7.2.2
    • affected 7.1.0 – ≤ 7.1.4
    • affected 7.0.0 – ≤ 7.0.2
    • affected < 7.0.0

References (1)

Sources

The same CVE in the primary databases and aggregators, to check against.

Badge for a README or a ticket

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Record last updated .