CVE-2026-62263

Critical

Description

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.

SeverityCritical

CVSS9.2

Exploit probability—

ProductOrg.openidentityplatform.openam:openam-auth-webauthn

PublishedSep 15, 2026

First seenSep 15, 2026

Weakness typeCWE-502Deserialization of untrusted data

How to fix

Update

org.openidentityplatform.openam:openam-auth-webauthn16.1.2 or later

Affected products

Product	Affected versions	Fixed in
org.openidentityplatform.openam:openam-auth-webauthnMaven	v < 16.1.2	16.1.2

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