CVE-2026-45051

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

Published Sep 15, 2026 CVSS 4.0 · 9.2 Critical EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-6c99-87fr-6q7r OpenAM: Pre-auth RCE via Java Deserialization in WebAuthn Authenticator Storage
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Openidentityplatform
Openidentityplatform openam
Vendors & Products Openidentityplatform
Openidentityplatform openam
Type Values Removed Values Added
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.
Title OpenAM Pre-auth RCE via Java Deserialization in WebAuthn Authenticator Storage
Weaknesses CWE-502
References
Metrics cvssV4_0

{'score': 9.2, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Sep 15, 2026, 1:53 PM
Reserved
May 8, 2026, 6:07 PM
Status
Awaiting Analysis
Published
Sep 15, 2026, 10:17 AM
Modified
Sep 23, 2026, 6:21 PM