CVE-2026-62263: CWE-502: Deserialization of Untrusted Data in OpenIdentityPlatform OpenAM
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.
CVE-2026-62263: CWE-502: Deserialization of Untrusted Data in OpenIdentityPlatform OpenAM
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.
CVSS v4.0
Score 9.2critical
Affected software
OpenIdentityPlatform
OpenAM
Weaknesses
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-07-13T17:09:57.574Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6aa917b955bf5e2cf5a323f4
Added to database: 09/15/2026, 10:02:33 UTC
Last updated: 09/15/2026, 10:02:33 UTC
Views: 1
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