All vulnerabilities
CVE-2026-45051GHSA-6c99-87fr-6q7r

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

OpenIdentityPlatform org.openidentityplatform.openam:openam-auth-webauthnmavenLibraries & packages
Open in ThreatlineRecord JSON
CVSS
9.2Critical
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.69%Chance of exploitation activity in the next 30 days, higher than 52% of CVEs. Scored 28 Oct 2026FIRST EPSS
Fixed in16.1.1Fixed versionGitHub
Published15 Sep 2026Updated 28 Oct 2026CVE List

What fixes it

  • 16.1.1org.openidentityplatform.openam:openam-auth-webauthn, mavenGitHub<dependency><groupId>org.openidentityplatform.openam</groupId><artifactId>openam-auth-webauthn</artifactId><version>16.1.1</version></dependency>
  • 16.1.1org.openidentityplatform.openam:openam-auth-webauthn, MavenOSV<dependency><groupId>org.openidentityplatform.openam</groupId><artifactId>openam-auth-webauthn</artifactId><version>16.1.1</version></dependency>

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

Summary

Description

A deserialization of untrusted data vulnerability (CWE-502) exists in OpenAM's WebAuthn authentication module. Under certain conditions, this may allow an attacker to achieve arbitrary code execution in the context of the application server. This affects OpenAM Community Edition through version 16.0.6 and was patched in version 16.1.1.

This is not the default configuration. Exploitation requires that an attacker has previously been able to write attacker-controlled data to a storage attribute read by the WebAuthn module, and that the WebAuthn authentication flow is reachable.

Impact

WebAuthn is a modern shipped module, but the vulnerable configuration requires either the default storage attribute to become attacker-writable, or the WebAuthn userAttribute to be set to an attacker-writable string attribute. That is not the default, but it is feasible in deployments because the product exposes the storage attribute as a free-form admin setting and does not warn or enforce that it must be server-managed and non-user-writable. This may exist through delegated administration, provisioning, write access to the backing LDAP/directory user record, legacy REST self-registration, or unsafe reconfiguration of userAttribute.

In any deployment where the attribute becomes user writable, an attacker can execute arbitrary code as the application server user.

Patch

This has been patched in OpenAM Community Edition version 16.1.1. Users are encouraged to update to the latest release.

Text from GitHub Advisory Database

Affected versions 43

  • org.openidentityplatform.openam:openam-auth-webauthn, maven<= 16.0.6GitHub
  • OpenAMaffected: < 16.1.1CVE List
  • org.openidentityplatform.openam:openam-auth-webauthn, Mavenfrom first release, fixed in 16.1.1OSV
  • org.openidentityplatform.openam:openam-auth-webauthn, Maven14.5.2OSV
  • org.openidentityplatform.openam:openam-auth-webauthn, Maven14.5.3OSV
  • org.openidentityplatform.openam:openam-auth-webauthn, Maven14.5.4OSV
  • org.openidentityplatform.openam:openam-auth-webauthn, Maven14.6.1OSV
  • org.openidentityplatform.openam:openam-auth-webauthn, Maven14.6.2OSV
  • org.openidentityplatform.openam:openam-auth-webauthn, Maven14.6.3OSV
  • org.openidentityplatform.openam:openam-auth-webauthn, Maven14.6.4OSV
  • org.openidentityplatform.openam:openam-auth-webauthn, Maven14.6.5OSV
  • org.openidentityplatform.openam:openam-auth-webauthn, Maven14.6.6OSV
  • org.openidentityplatform.openam:openam-auth-webauthn, Maven14.7.0OSV
  • org.openidentityplatform.openam:openam-auth-webauthn, Maven14.7.1OSV
  • org.openidentityplatform.openam:openam-auth-webauthn, Maven14.7.2OSV
  • org.openidentityplatform.openam:openam-auth-webauthn, Maven14.7.3OSV
  • org.openidentityplatform.openam:openam-auth-webauthn, Maven14.7.4OSV
  • org.openidentityplatform.openam:openam-auth-webauthn, Maven14.8.1OSV
  • org.openidentityplatform.openam:openam-auth-webauthn, Maven14.8.2OSV
  • org.openidentityplatform.openam:openam-auth-webauthn, Maven14.8.3OSV
  • org.openidentityplatform.openam:openam-auth-webauthn, Maven14.8.4OSV
  • org.openidentityplatform.openam:openam-auth-webauthn, Maven15.0.0OSV
  • org.openidentityplatform.openam:openam-auth-webauthn, Maven15.0.1OSV
  • org.openidentityplatform.openam:openam-auth-webauthn, Maven15.0.2OSV
  • org.openidentityplatform.openam:openam-auth-webauthn, Maven15.0.3OSV
  • org.openidentityplatform.openam:openam-auth-webauthn, Maven15.0.4OSV
  • org.openidentityplatform.openam:openam-auth-webauthn, Maven15.1.0OSV
  • org.openidentityplatform.openam:openam-auth-webauthn, Maven15.1.1OSV
  • org.openidentityplatform.openam:openam-auth-webauthn, Maven15.1.2OSV
  • org.openidentityplatform.openam:openam-auth-webauthn, Maven15.1.3OSV
  • org.openidentityplatform.openam:openam-auth-webauthn, Maven15.1.4OSV
  • org.openidentityplatform.openam:openam-auth-webauthn, Maven15.1.5OSV
  • org.openidentityplatform.openam:openam-auth-webauthn, Maven15.1.6OSV
  • org.openidentityplatform.openam:openam-auth-webauthn, Maven15.2.0OSV
  • org.openidentityplatform.openam:openam-auth-webauthn, Maven15.2.1OSV
  • org.openidentityplatform.openam:openam-auth-webauthn, Maven15.2.2OSV
  • org.openidentityplatform.openam:openam-auth-webauthn, Maven16.0.1OSV
  • org.openidentityplatform.openam:openam-auth-webauthn, Maven16.0.2OSV
  • org.openidentityplatform.openam:openam-auth-webauthn, Maven16.0.3OSV
  • org.openidentityplatform.openam:openam-auth-webauthn, Maven16.0.4OSV
  • org.openidentityplatform.openam:openam-auth-webauthn, Maven16.0.5OSV
  • org.openidentityplatform.openam:openam-auth-webauthn, Maven16.0.6OSV
  • org.openidentityplatform.openam:openam-auth-webauthn, Maven16.1.0OSV

References 5