CVE-2026-48717: Open Identity Platform OpenAM OAuth authorization bypass in PKCE challenge

CVE-2026-48717 · Severity: medium · CVSS 4 · Published 2026-09-15

OpenAM is an identity and access management platform used to secure web applications and services. A security flaw in its login process allows attackers who intercept a temporary authorization code to bypass a security check called PKCE. This could allow an unauthorized person to gain access to a user's account or sensitive data without having the required secret verification key.

Technologies: org.openidentityplatform.openam:openam-oauth2 (Maven), Open Identity Platform OpenAM Community Edition. Vendors: Maven, Open Identity Platform.

Quick answers

Is CVE-2026-48717 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-48717 being exploited in the wild.
How severe is CVE-2026-48717?
Medium severity, with a CVSS score of 4, published 15 September 2026.
Which products and versions are affected?
org.openidentityplatform.openam:openam-oauth2 (Maven) <= 16.0.6, ECOSYSTEM:introduced=0,fixed=16.1.1; Open Identity Platform OpenAM Community Edition <= 16.0.6.
Is there a fix for CVE-2026-48717?
Yes. org.openidentityplatform.openam:openam-oauth2 (Maven): upgrade to 16.1.1 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-48717 attacked?
It is attacked over the network, in a hosted service.
Am I affected by CVE-2026-48717?
Check whether you run org.openidentityplatform.openam:openam-oauth2 (Maven) or Open Identity Platform OpenAM Community Edition at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • org.openidentityplatform.openam:openam-oauth2 (Maven): upgrade to 16.1.1 or later
    # set org.openidentityplatform.openam:openam-oauth2 to 16.1.1 in your pom.xml or build.gradle

Technical details

An improper authorization vulnerability (CWE-285) exists in OpenAM's OAuth2 implementation. While the authorize endpoint correctly stores a code_challenge, the token endpoint only enforces the presence of a code_verifier if the 'codeVerifierEnforced' setting is enabled (it is disabled by default). If this setting is off, an attacker can redeem a PKCE-protected authorization code by simply omitting the code_verifier parameter, as the system only performs a challenge check if a verifier is actually provided. This allows for authorization code injection or interception attacks against public clients. The issue is patched in version 16.1.1.

Affected products

  • Open Identity Platform OpenAM Community Edition <= 16.0.6

Identifiers

  • CVE-2026-48717
  • GHSA-4v2w-2wqp-mc85

Timeline

  • 2026-06-28: disclosed
  • 2026-06-29: advisory

References

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