{"id":"CVE-2026-62263","title":"Open Access Management (OpenAM) is an access management solution","summary":"Open Access Management (OpenAM) is an access management solution. Prior to 16.1.2, WebAuthnAuthentication.deserialize applies an ObjectInputFilter that allows every serialized object at depth greater than 1 and therefore constrains only …","severity":"critical","cvss":9.2,"cvssVector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","cwe":["CWE-502"],"vendor":"OpenIdentityPlatform","product":"OpenAM","affected":["OpenAM < 16.1.2"],"patched":["org.openidentityplatform.openam:openam-auth-webauthn 16.1.2"],"published":"2026-09-15","updated":"2026-09-15","sourceUpdated":"2026-09-15T14:17:03.660","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-62263","references":[{"url":"https://github.com/OpenIdentityPlatform/OpenAM/commit/9dd0fbe07f70f118cf45042d3a9ffb32f3c21e08","label":"security-advisories@github.com"},{"url":"https://github.com/OpenIdentityPlatform/OpenAM/releases/tag/16.1.2","label":"security-advisories@github.com"},{"url":"https://github.com/OpenIdentityPlatform/OpenAM/security/advisories/GHSA-gf8h-gq53-288j","label":"security-advisories@github.com"},{"url":"https://github.com/advisories/GHSA-gf8h-gq53-288j"}],"tags":["nvd","cve.org","ghsa","maven"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-09-15T13:26:16.953354Z"},"cvssSource":"cna","epss":0.0055,"epssPercentile":0.44652,"aliases":["GHSA-gf8h-gq53-288j"],"ecosystem":"maven","ingestedAt":"2026-07-24T21:39:14.712Z","slug":"CVE-2026-62263","body":"## Overview\n\nOpen Access Management (OpenAM) is an access management solution. Prior to 16.1.2, WebAuthnAuthentication.deserialize applies an ObjectInputFilter that allows every serialized object at depth greater than 1 and therefore constrains only an AuthenticatorImpl root object. A pre-authentication attacker can supply a userHandle whose serialized graph has a valid AuthenticatorImpl root and a nested gadget class, causing readObject or readResolve execution before the cast and assertion verification when a usable gadget is on the classpath. This bypasses the incomplete remediation for the earlier WebAuthn deserialization vulnerability. This issue is fixed in version 16.1.2.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-62263)\n\nAffected packages:\n\n- `org.openidentityplatform.openam:openam-auth-webauthn <= 16.1.1`\n\nPatched in:\n\n- `org.openidentityplatform.openam:openam-auth-webauthn 16.1.2`\n\nSource: https://github.com/advisories/GHSA-gf8h-gq53-288j","depth":"midnight","depthScore":51,"depthScoreParts":{"impact":50.6,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":203559,"id":"CVE-2026-62263","ts":1789468562601,"field":"cvss","old":null,"new":"9.2"}]}