CVE-2026-62263Critical· 9.2▾ MidnightOpen 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 …
▾ Midnight zone — Critical, or high with PoC / in-the-wild
impact 50.6 · likelihood 0.1 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Exploit-prediction probability, daily snapshots since Sep 15.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.9%
— → 9.2
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.
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Affected packages:
org.openidentityplatform.openam:openam-auth-webauthn <= 16.1.1Patched in:
org.openidentityplatform.openam:openam-auth-webauthn 16.1.2Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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