All vulnerabilities
CVE-2026-47426GHSA-f2cx-463q-7m2c

OpenAM OAuth Client Impersonation via JWKS Resolver Cache

OpenIdentityPlatform org.openidentityplatform.openam:openam-oauth2mavenLibraries & packages
Open in ThreatlineRecord JSON
CVSS
7.1High
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.55%Chance of exploitation activity in the next 30 days, higher than 46% 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-oauth2, mavenGitHub<dependency><groupId>org.openidentityplatform.openam</groupId><artifactId>openam-oauth2</artifactId><version>16.1.1</version></dependency>
  • 16.1.1org.openidentityplatform.openam:openam-oauth2, MavenOSV<dependency><groupId>org.openidentityplatform.openam</groupId><artifactId>openam-oauth2</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

An Improper Authentication (CWE-287) issue in OpenAM's OAuth2 private_key_jwt client authentication path allows any registered OAuth2 client to mint tokens in the name of any other client whose key is published via a jwks_uri, without knowing the victim's signing key. This affects OpenAM Community Edition through version 16.0.6 and was patched in version 16.1.1.

Impact

OpenAM Community Edition deployments through version 16.0.6 that have OAuth2 clients configured for private_key_jwt authentication with keys published via jwks_uri are potentially affected. An attacker holding any such client registration, their own, or one obtained through open dynamic client registration where enabled, can mint access tokens in any other such client's name, in any realm hosted by the OpenAM process.

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-oauth2, maven<= 16.0.6GitHub
  • OpenAMaffected: < 16.1.1CVE List
  • org.openidentityplatform.openam:openam-oauth2, Mavenfrom first release, fixed in 16.1.1OSV
  • org.openidentityplatform.openam:openam-oauth2, Maven14.5.2OSV
  • org.openidentityplatform.openam:openam-oauth2, Maven14.5.3OSV
  • org.openidentityplatform.openam:openam-oauth2, Maven14.5.4OSV
  • org.openidentityplatform.openam:openam-oauth2, Maven14.6.1OSV
  • org.openidentityplatform.openam:openam-oauth2, Maven14.6.2OSV
  • org.openidentityplatform.openam:openam-oauth2, Maven14.6.3OSV
  • org.openidentityplatform.openam:openam-oauth2, Maven14.6.4OSV
  • org.openidentityplatform.openam:openam-oauth2, Maven14.6.5OSV
  • org.openidentityplatform.openam:openam-oauth2, Maven14.6.6OSV
  • org.openidentityplatform.openam:openam-oauth2, Maven14.7.0OSV
  • org.openidentityplatform.openam:openam-oauth2, Maven14.7.1OSV
  • org.openidentityplatform.openam:openam-oauth2, Maven14.7.2OSV
  • org.openidentityplatform.openam:openam-oauth2, Maven14.7.3OSV
  • org.openidentityplatform.openam:openam-oauth2, Maven14.7.4OSV
  • org.openidentityplatform.openam:openam-oauth2, Maven14.8.1OSV
  • org.openidentityplatform.openam:openam-oauth2, Maven14.8.2OSV
  • org.openidentityplatform.openam:openam-oauth2, Maven14.8.3OSV
  • org.openidentityplatform.openam:openam-oauth2, Maven14.8.4OSV
  • org.openidentityplatform.openam:openam-oauth2, Maven15.0.0OSV
  • org.openidentityplatform.openam:openam-oauth2, Maven15.0.1OSV
  • org.openidentityplatform.openam:openam-oauth2, Maven15.0.2OSV
  • org.openidentityplatform.openam:openam-oauth2, Maven15.0.3OSV
  • org.openidentityplatform.openam:openam-oauth2, Maven15.0.4OSV
  • org.openidentityplatform.openam:openam-oauth2, Maven15.1.0OSV
  • org.openidentityplatform.openam:openam-oauth2, Maven15.1.1OSV
  • org.openidentityplatform.openam:openam-oauth2, Maven15.1.2OSV
  • org.openidentityplatform.openam:openam-oauth2, Maven15.1.3OSV
  • org.openidentityplatform.openam:openam-oauth2, Maven15.1.4OSV
  • org.openidentityplatform.openam:openam-oauth2, Maven15.1.5OSV
  • org.openidentityplatform.openam:openam-oauth2, Maven15.1.6OSV
  • org.openidentityplatform.openam:openam-oauth2, Maven15.2.0OSV
  • org.openidentityplatform.openam:openam-oauth2, Maven15.2.1OSV
  • org.openidentityplatform.openam:openam-oauth2, Maven15.2.2OSV
  • org.openidentityplatform.openam:openam-oauth2, Maven16.0.1OSV
  • org.openidentityplatform.openam:openam-oauth2, Maven16.0.2OSV
  • org.openidentityplatform.openam:openam-oauth2, Maven16.0.3OSV
  • org.openidentityplatform.openam:openam-oauth2, Maven16.0.4OSV
  • org.openidentityplatform.openam:openam-oauth2, Maven16.0.5OSV
  • org.openidentityplatform.openam:openam-oauth2, Maven16.0.6OSV
  • org.openidentityplatform.openam:openam-oauth2, Maven16.1.0OSV

References 5