---
id: CVE-2026-44203
title: Open Access Management (OpenAM) is an access management solution
summary: >-
  Open Access Management (OpenAM) is an access management solution. Prior to
  16.1.1, the OAuth 2.0 and OpenID Connect authorization endpoint does not
  sufficiently encode user-supplied parameters before FormPostResponse.ftl and
  checkSession…
severity: high
cvss: 8.3
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:H/VA:N/SC:L/SI:H/SA:N'
cwe:
  - CWE-79
vendor: OpenIdentityPlatform
product: OpenAM
affected:
  - OpenAM < 16.1.1
patched:
  - 'org.openidentityplatform.openam:openam-oauth2 16.1.1'
published: '2026-09-15'
updated: '2026-09-23'
sourceUpdated: '2026-09-23T18:19:19.803'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-44203'
references:
  - url: >-
      https://github.com/OpenIdentityPlatform/OpenAM/commit/078bd4754905f5130eaa7bbe45f958eaeb7fd0d7
    label: security-advisories@github.com
  - url: 'https://github.com/OpenIdentityPlatform/OpenAM/releases/tag/16.1.1'
    label: security-advisories@github.com
  - url: >-
      https://github.com/OpenIdentityPlatform/OpenAM/security/advisories/GHSA-fq9h-c788-fx73
    label: security-advisories@github.com
  - url: 'https://github.com/advisories/GHSA-fq9h-c788-fx73'
tags:
  - nvd
  - cve.org
  - ghsa
  - maven
epss: 0.00593
epssPercentile: 0.461
ecosystem: maven
cvssSource: cna
scores:
  cna: 8.3
  ghsa: 9.3
ingestedAt: '2026-06-29T13:24:35.515Z'
---

## Overview

Open Access Management (OpenAM) is an access management solution. Prior to 16.1.1, the OAuth 2.0 and OpenID Connect authorization endpoint does not sufficiently encode user-supplied parameters before FormPostResponse.ftl and checkSession.ftl render them into HTML for the form_post response mode. An unauthenticated attacker can induce a user to open a crafted authorization request and execute script in the OpenAM origin. This issue is fixed in version 16.1.1.

## Remediation

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

## Package advisory (CVE-2026-44203)

Affected packages:

- `org.openidentityplatform.openam:openam-oauth2 >= 13.0.0, < 16.1.1`

Patched in:

- `org.openidentityplatform.openam:openam-oauth2 16.1.1`

Source: https://github.com/advisories/GHSA-fq9h-c788-fx73