Vulnerability-Lookup

CVE-2026-21391 (GCVE-0-2026-21391)

Vulnerability from cvelistv5 – Published: 2026-09-14 11:18 – Updated: 2026-09-14 14:25

Title

Improper Claim Validation in PingAM OIDC Provider

Summary

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.

Severity

9.5 (Critical)


                        
                          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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-14 14:24 UTC

CWE

CWE-290 - Authentication bypass by spoofing

Assigner

Ping Identity

References

1 reference

URL	Tags
https://support.pingidentity.com/s/article/PingAM…

Impacted products

1 product

Vendor	Product	Version	CPE status
Ping Identity	PingAM	Affected: 8.1.0 (semver) Affected: 8.0.0 , ≤ 8.0.2 (semver) Affected: 7.5.0 , ≤ 7.5.2 (semver) Affected: 7.4.0 , ≤ 7.4.2 (semver) Affected: 7.3.0 , ≤ 7.3.3 (semver) Affected: 7.2.0 , ≤ 7.2.2 (semver) Affected: 7.1.0 , ≤ 7.1.4 (semver) Affected: 7.0.0 , ≤ 7.0.2 (semver) Affected: 0 , < 7.0.0 (semver)	guessed

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-21391

Vulnerability from fkie_nvd - Published: 2026-09-14 12:17 - Updated: 2026-09-14 15:17

Severity

9.5 (Critical) - 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

Summary

References

	URL	Tags
	responsible-disclosure@pingidentity.com	https://support.pingidentity.com/s/article/PingAM-Security-Advisory-202603

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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          "defaultStatus": "affected",
          "product": "PingAM",
          "vendor": "Ping Identity",
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GHSA-CVQ5-QF5H-V345

Vulnerability from github – Published: 2026-09-14 12:31 – Updated: 2026-09-14 12:31

Details

Severity

9.5 (Critical)


                  
                    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

Show details on source website

JSON

To clipboard

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    "github_reviewed_at": null,
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  },
  "details": "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.",
  "id": "GHSA-cvq5-qf5h-v345",
  "modified": "2026-09-14T12:31:40Z",
  "published": "2026-09-14T12:31:40Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-21391"
    },
    {
      "type": "WEB",
      "url": "https://support.pingidentity.com/s/article/PingAM-Security-Advisory-202603"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "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/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",
      "type": "CVSS_V4"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

CVE-2026-21391 (GCVE-0-2026-21391)

FKIE_CVE-2026-21391

GHSA-CVQ5-QF5H-V345

Tags

Sightings

Nomenclature