OpenIdentityPlatform OpenAM up to 16.1.0 WebAuthn Authentication loadAuthenticators userAttribute deserialization

CVSS Meta Temp Score
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CTI Interest Score
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6.0$0-$5k0.38

Summaryinfo

A vulnerability has been found in OpenIdentityPlatform OpenAM up to 16.1.0 and classified as critical. This vulnerability affects the function loadAuthenticators of the component WebAuthn Authentication. The manipulation of the argument userAttribute leads to deserialization. This vulnerability is traded as CVE-2026-45051. It is possible to initiate the attack remotely. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in OpenIdentityPlatform OpenAM up to 16.1.0. It has been rated as critical. This issue affects the function loadAuthenticators of the component WebAuthn Authentication. The manipulation of the argument userAttribute with an unknown input leads to a deserialization vulnerability. Using CWE to declare the problem leads to CWE-502. The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-45051 since 05/08/2026. The exploitation is known to be easy. The attack may be initiated remotely. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 16.1.1 eliminates this vulnerability.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Deserialization
CWE: CWE-502 / CWE-20
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: OpenAM 16.1.1

Timelineinfo

05/08/2026 CVE reserved
09/15/2026 +130 days Advisory disclosed
09/15/2026 +0 days VulDB entry created
09/15/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-45051 (🔒)
GCVE (CVE): GCVE-0-2026-45051
GCVE (VulDB): GCVE-100-404099

Entryinfo

Created: 09/15/2026 12:12
Changes: 09/15/2026 12:12 (69)
Complete: 🔍
Cache ID: 216::103

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