OpenAM: WebAuthn Java deserialization RCE via ObjectInputFilter depth>1 bypass (CVE-2026-62263) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-62263GHSA-GF8H-GQ53-288J

OpenAM: WebAuthn Java deserialization RCE via ObjectInputFilter depth>1 bypass

Answer in brief

CVE-2026-62263 records a Unknown severity vulnerability in OpenAM: WebAuthn Java deserialization RCE via ObjectInputFilter depth>1 bypass. The current sources do not mark it as known exploited. The current feed maps OpenIdentityPlatform/OpenAM (generic), org.openidentityplatform.openam:openam-auth-webauthn (maven). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 15, 2026Updated Sep 15, 2026Source checked Sep 15, 2026First seen by HOL Aug 8, 2026Material review Sep 15, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps OpenIdentityPlatform/OpenAM (generic), org.openidentityplatform.openam:openam-auth-webauthn (maven). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
OpenIdentityPlatform/OpenAMgeneric	< 16.1.2	Not reported
org.openidentityplatform.openam:openam-auth-webauthnmaven	>=0 <16.1.2	16.1.2

Recommended response

Check inventory. Check lockfiles and deployed manifests for OpenIdentityPlatform/OpenAM, org.openidentityplatform.openam:openam-auth-webauthn.
Review the reported fix. Update org.openidentityplatform.openam:openam-auth-webauthn to 16.1.2 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 15, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 15, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 8, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.