---
id: CVE-2026-105119
title: >-
  OpenAM before 16.1.3 applies its OAuth2 Provider PKCE enforcement only to
  authorization requests whose response_type is exactly code, so codes issued
  through OpenID Connect hybrid flows (code token, code id_token, code token
  id_token) ca…
summary: >-
  OpenAM before 16.1.3 applies its OAuth2 Provider PKCE enforcement only to
  authorization requests whose response_type is exactly code, so codes issued
  through OpenID Connect hybrid flows (code token, code id_token, code token
  id_token) ca…
severity: medium
cvss: 6.8
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N'
cwe:
  - CWE-285
vendor: OpenIdentityPlatform
product: OpenAM
affected:
  - OpenAM < 16.1.3
published: '2026-10-03'
updated: '2026-10-03'
sourceUpdated: '2026-10-03T14:16:38.710'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-105119'
references:
  - url: >-
      https://github.com/OpenIdentityPlatform/OpenAM/security/advisories/GHSA-5p2f-7vcr-6vfh
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/openam-before-16.1.3-pkce-enforcement-bypass-via-oauth-2.0-hybrid-flows
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-03T14:47:06.465Z'
---

## Overview

OpenAM before 16.1.3 applies its OAuth2 Provider PKCE enforcement only to authorization requests whose response_type is exactly code, so codes issued through OpenID Connect hybrid flows (code token, code id_token, code token id_token) carry no bound challenge. An attacker who intercepts such a code can redeem it for a public client's tokens with any non-empty code_verifier.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.