{"api_version":"1","generated_at":"2026-10-27T06:05:16+00:00","cve":"CVE-2026-21391","urls":{"html":"https://cve.report/CVE-2026-21391","api":"https://cve.report/api/cve/CVE-2026-21391.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-21391","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-21391"},"summary":{"title":"Improper Claim Validation in PingAM OIDC Provider","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.","state":"PUBLISHED","assigner":"Ping Identity","published_at":"2026-09-14 12:17:38","updated_at":"2026-09-18 19:30:42"},"problem_types":["CWE-290","CWE-290 CWE-290 Authentication bypass by spoofing"],"metrics":[{"version":"4.0","source":"responsible-disclosure@pingidentity.com","type":"Secondary","score":"9.5","severity":"CRITICAL","vector":"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","data":{"version":"4.0","vectorString":"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","baseScore":9.5,"baseSeverity":"CRITICAL","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"LOW","subConfidentialityImpact":"HIGH","subIntegrityImpact":"HIGH","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","confidentialityRequirement":"NOT_DEFINED","integrityRequirement":"NOT_DEFINED","availabilityRequirement":"NOT_DEFINED","modifiedAttackVector":"NOT_DEFINED","modifiedAttackComplexity":"NOT_DEFINED","modifiedAttackRequirements":"NOT_DEFINED","modifiedPrivilegesRequired":"NOT_DEFINED","modifiedUserInteraction":"NOT_DEFINED","modifiedVulnConfidentialityImpact":"NOT_DEFINED","modifiedVulnIntegrityImpact":"NOT_DEFINED","modifiedVulnAvailabilityImpact":"NOT_DEFINED","modifiedSubConfidentialityImpact":"NOT_DEFINED","modifiedSubIntegrityImpact":"NOT_DEFINED","modifiedSubAvailabilityImpact":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED"}},{"version":"4.0","source":"CNA","type":"CVSS","score":"9.5","severity":"CRITICAL","vector":"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","data":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":9.5,"baseSeverity":"CRITICAL","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"HIGH","subIntegrityImpact":"HIGH","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"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","version":"4.0","vulnAvailabilityImpact":"LOW","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnerabilityResponseEffort":"NOT_DEFINED"}}],"references":[{"url":"https://support.pingidentity.com/s/article/PingAM-Security-Advisory-202603","name":"https://support.pingidentity.com/s/article/PingAM-Security-Advisory-202603","refsource":"responsible-disclosure@pingidentity.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-21391","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-21391","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Ping Identity","product":"PingAM","version":"affected 8.1.0 semver","platforms":[]},{"source":"CNA","vendor":"Ping Identity","product":"PingAM","version":"affected 8.0.0 8.0.2 semver","platforms":[]},{"source":"CNA","vendor":"Ping Identity","product":"PingAM","version":"affected 7.5.0 7.5.2 semver","platforms":[]},{"source":"CNA","vendor":"Ping Identity","product":"PingAM","version":"affected 7.4.0 7.4.2 semver","platforms":[]},{"source":"CNA","vendor":"Ping Identity","product":"PingAM","version":"affected 7.3.0 7.3.3 semver","platforms":[]},{"source":"CNA","vendor":"Ping Identity","product":"PingAM","version":"affected 7.2.0 7.2.2 semver","platforms":[]},{"source":"CNA","vendor":"Ping Identity","product":"PingAM","version":"affected 7.1.0 7.1.4 semver","platforms":[]},{"source":"CNA","vendor":"Ping Identity","product":"PingAM","version":"affected 7.0.0 7.0.2 semver","platforms":[]},{"source":"CNA","vendor":"Ping Identity","product":"PingAM","version":"affected 7.0.0 semver","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"21391","cve":"CVE-2026-21391","epss":"0.004460000","percentile":"0.380440000","score_date":"2026-09-21","updated_at":"2026-09-22 00:03:18"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"adp":[{"metrics":[{"other":{"content":{"id":"CVE-2026-21391","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","timestamp":"2026-09-14T14:24:57.614272Z","version":"2.0.3"},"type":"ssvc"}}],"providerMetadata":{"dateUpdated":"2026-09-14T14:25:10.479Z","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP"},"title":"CISA ADP Vulnrichment"}],"cna":{"affected":[{"defaultStatus":"affected","product":"PingAM","vendor":"Ping Identity","versions":[{"status":"affected","version":"8.1.0","versionType":"semver"},{"lessThanOrEqual":"8.0.2","status":"affected","version":"8.0.0","versionType":"semver"},{"lessThanOrEqual":"7.5.2","status":"affected","version":"7.5.0","versionType":"semver"},{"lessThanOrEqual":"7.4.2","status":"affected","version":"7.4.0","versionType":"semver"},{"lessThanOrEqual":"7.3.3","status":"affected","version":"7.3.0","versionType":"semver"},{"lessThanOrEqual":"7.2.2","status":"affected","version":"7.2.0","versionType":"semver"},{"lessThanOrEqual":"7.1.4","status":"affected","version":"7.1.0","versionType":"semver"},{"lessThanOrEqual":"7.0.2","status":"affected","version":"7.0.0","versionType":"semver"},{"changes":[{"at":"0","status":"affected"}],"lessThan":"7.0.0","status":"affected","version":"0","versionType":"semver"}]}],"descriptions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"<div>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.</div><br>"}],"value":"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."}],"impacts":[{"capecId":"CAPEC-21","descriptions":[{"lang":"en","value":"CAPEC-21 Exploitation of Trusted Identifiers"}]}],"metrics":[{"cvssV4_0":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":9.5,"baseSeverity":"CRITICAL","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"HIGH","subIntegrityImpact":"HIGH","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"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","version":"4.0","vulnAvailabilityImpact":"LOW","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnerabilityResponseEffort":"NOT_DEFINED"},"format":"CVSS","scenarios":[{"lang":"en","value":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-290","description":"CWE-290 Authentication bypass by spoofing","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-09-14T11:18:33.045Z","orgId":"5998a2e9-ae88-42cd-b6e0-7564fd979f9e","shortName":"Ping Identity"},"references":[{"url":"https://support.pingidentity.com/s/article/PingAM-Security-Advisory-202603"}],"source":{"discovery":"EXTERNAL"},"title":"Improper Claim Validation in PingAM OIDC Provider","x_generator":{"engine":"Vulnogram 1.0.5"}}},"cveMetadata":{"assignerOrgId":"5998a2e9-ae88-42cd-b6e0-7564fd979f9e","assignerShortName":"Ping Identity","cveId":"CVE-2026-21391","datePublished":"2026-09-14T11:18:33.045Z","dateReserved":"2026-01-07T15:15:23.421Z","dateUpdated":"2026-09-14T14:25:10.479Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-14 12:17:38","lastModifiedDate":"2026-09-18 19:30:42","problem_types":["CWE-290","CWE-290 CWE-290 Authentication bypass by spoofing"],"metrics":{"cvssMetricV40":[{"source":"responsible-disclosure@pingidentity.com","type":"Secondary","cvssData":{"version":"4.0","vectorString":"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","baseScore":9.5,"baseSeverity":"CRITICAL","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"LOW","subConfidentialityImpact":"HIGH","subIntegrityImpact":"HIGH","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","confidentialityRequirement":"NOT_DEFINED","integrityRequirement":"NOT_DEFINED","availabilityRequirement":"NOT_DEFINED","modifiedAttackVector":"NOT_DEFINED","modifiedAttackComplexity":"NOT_DEFINED","modifiedAttackRequirements":"NOT_DEFINED","modifiedPrivilegesRequired":"NOT_DEFINED","modifiedUserInteraction":"NOT_DEFINED","modifiedVulnConfidentialityImpact":"NOT_DEFINED","modifiedVulnIntegrityImpact":"NOT_DEFINED","modifiedVulnAvailabilityImpact":"NOT_DEFINED","modifiedSubConfidentialityImpact":"NOT_DEFINED","modifiedSubIntegrityImpact":"NOT_DEFINED","modifiedSubAvailabilityImpact":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED"}}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-09-14T14:24:57.614272Z","id":"CVE-2026-21391","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"21391","Ordinal":"1","Title":"Improper Claim Validation in PingAM OIDC Provider","CVE":"CVE-2026-21391","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"21391","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"Improper Claim Validation in PingAM OIDC Provider"}]}}}