{"id":"CVE-2026-62263","summary":"OpenAM: WebAuthn Java deserialization RCE via ObjectInputFilter depth\u003e1 bypass","details":"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 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.","aliases":["GHSA-gf8h-gq53-288j"],"modified":"2026-09-17T08:15:56.896360Z","published":"2026-09-15T09:52:58.323Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-502"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/62xxx/CVE-2026-62263.json"},"references":[{"type":"WEB","url":"https://github.com/OpenIdentityPlatform/OpenAM/releases/tag/16.1.2"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/62xxx/CVE-2026-62263.json"},{"type":"ADVISORY","url":"https://github.com/OpenIdentityPlatform/OpenAM/security/advisories/GHSA-gf8h-gq53-288j"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-62263"},{"type":"FIX","url":"https://github.com/OpenIdentityPlatform/OpenAM/commit/9dd0fbe07f70f118cf45042d3a9ffb32f3c21e08"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/openidentityplatform/openam","events":[{"introduced":"0"},{"fixed":"9dd0fbe07f70f118cf45042d3a9ffb32f3c21e08"},{"fixed":"73a64a20348d5448e0820469539c8af75f08d314"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"16.1.2"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"versions":["16.1.1","16.0.6","16.0.5","16.0.4","16.0.3","15.2.2","15.2.1","15.2.0","15.1.6","15.1.5","15.1.4","15.1.3","15.1.2","15.1.1","15.1.0","15.0.4","15.0.3","15.0.2","15.0.1","15.0.0","14.8.4","14.8.3","14.8.2","14.8.1","14.7.4","14.7.3","14.7.2","14.7.1","14.7.0","14.6.6","14.6.5","14.6.4","14.6.3","14.6.2","14.5.4","14.5.3","14.5.2","14.5.1","14.4.2","14.4.1","14.3.1","14.2.2","14.2.1","14.1.17","14.1.16","14.1.13","14.1.12","14.1.11","14.1.10","14.1.9","14.1.8","14.1.7","14.1.6","14.1.5","14.1.4","14.1.3","14.1.2","14.1.1","14.0.6","14.0.5","14.0.4","14.0.3","14.0.2","14.0.1","14.0.0","13.0.0","13.0.0-RC10","13.0.0-RC9","13.0.0-RC8","13.0.0-RC7","13.0.0-RC6","13.0.0-RC5","13.0.0-RC4","13.0.0-RC3","13.0.0-RC2","13.0.0-RC1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-62263.json","vanir_signatures_modified":"2026-09-17T08:15:56Z","vanir_signatures":[{"target":{"file":"openam-authentication/openam-auth-webauthn/src/main/java/org/openidentityplatform/openam/authentication/modules/webauthn/WebAuthnAuthentication.java"},"deprecated":false,"digest":{"line_hashes":["300892709995752600297300882855720813025","134489059539257899292017569511051217255","14984273271998650707426652724379454032","330508998647977613261543659064988338509","132344394188562217024451992560456583994","166351777029273874683844504259828161478","320542433970164632144013878259938806022","279651339661801232927078845734205809229","137307033923304792036408496962702711726","319161297130484222891513514816903320311","173669204121573916947386127985344630030"],"threshold":0.9},"id":"CVE-2026-62263-3be4384a","signature_type":"Line","signature_version":"v1","source":"https://github.com/openidentityplatform/openam/commit/9dd0fbe07f70f118cf45042d3a9ffb32f3c21e08"},{"deprecated":false,"digest":{"line_hashes":["162896521443428963922294223997745335743","83664901016198083371520281040543341894","314358266118408012889934797175996532260"],"threshold":0.9},"id":"CVE-2026-62263-8f510544","signature_type":"Line","signature_version":"v1","source":"https://github.com/openidentityplatform/openam/commit/9dd0fbe07f70f118cf45042d3a9ffb32f3c21e08","target":{"file":"openam-authentication/openam-auth-webauthn/src/test/java/org/openidentityplatform/openam/authentication/modules/webauthn/WebAuthnAuthenticationRceTest.java"}},{"deprecated":false,"digest":{"function_hash":"301960258716445583424348533938700954946","length":736},"id":"CVE-2026-62263-ae492609","signature_type":"Function","signature_version":"v1","source":"https://github.com/openidentityplatform/openam/commit/9dd0fbe07f70f118cf45042d3a9ffb32f3c21e08","target":{"file":"openam-authentication/openam-auth-webauthn/src/main/java/org/openidentityplatform/openam/authentication/modules/webauthn/WebAuthnAuthentication.java","function":"deserialize"}}]}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"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"}]}