{"id":"CVE-2026-21391","title":"An improper validation vulnerability exists within PingAM where a well-crafted request allows arbitrary or protected ID Token claims to be set or overridden","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…","severity":"critical","cvss":9.5,"cvssVector":"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","cwe":["CWE-290"],"vendor":"Ping Identity","product":"PingAM","affected":["PingAM 8.1.0","PingAM >= 8.0.0 <= 8.0.2","PingAM >= 7.5.0 <= 7.5.2","PingAM >= 7.4.0 <= 7.4.2","PingAM >= 7.3.0 <= 7.3.3","PingAM >= 7.2.0 <= 7.2.2","PingAM >= 7.1.0 <= 7.1.4","PingAM >= 7.0.0 <= 7.0.2","PingAM < 7.0.0"],"published":"2026-09-14","updated":"2026-09-18","sourceUpdated":"2026-09-18T19:30:42.730","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-21391","references":[{"url":"https://support.pingidentity.com/s/article/PingAM-Security-Advisory-202603","label":"responsible-disclosure@pingidentity.com"}],"tags":["nvd","cve.org"],"epss":0.00446,"epssPercentile":0.38044,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-09-14T14:24:57.614272Z"},"cvssSource":"cna","ingestedAt":"2026-09-14T15:23:07.421Z","slug":"CVE-2026-21391","body":"## Overview\n\nAn 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":52,"depthScoreParts":{"impact":52.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}