OpenAM Pre-auth RCE via Java Deserialization in WebAuthn Authenticator Storage (CVE-2026-45051) | HOL Guard CVE

Critical severityCVE-2026-45051GHSA-6C99-87FR-6Q7R

OpenAM Pre-auth RCE via Java Deserialization in WebAuthn Authenticator Storage

Answer in brief

CVE-2026-45051 records a Critical severity vulnerability in OpenAM Pre-auth RCE via Java Deserialization in WebAuthn Authenticator Storage. 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 17, 2026First seen by HOL Jun 24, 2026Material review Sep 15, 2026

Upstream Advisory

Key facts

Risk: Critical
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	< 16.1.1	Not reported
org.openidentityplatform.openam:openam-auth-webauthnmaven	<=16.0.6	16.1.1

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 16.1.1 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
Jun 24, 2026

Sources and claim methodology

Upstream source description

Open Access Management (OpenAM) is an access management solution. Prior to 16.1.1, WebAuthnAuthentication loads a serialized AuthenticatorImpl object graph from the configured userAttribute through loadAuthenticators without an ObjectInputFilter. Exploitation requires the WebAuthn flow to be reachable and an attacker to have previously written controlled data to that attribute through delegated administration, provisioning, directory access, legacy REST self-registration, or unsafe configuration. When those non-default conditions hold, the data is deserialized before assertion verification and can execute a classpath gadget in the application server process. This issue is fixed in version 16.1.1.

Quoted source text, attributed separately from HOL analysis.