What is GHSA-fq9h-c788-fx73?

GHSA-fq9h-c788-fx73 is a security advisory published by GitHub Security Advisories with Critical severity. OpenAM has pre-auth Reflected XSS in OAuth2 / OIDC response_mode=form_post via state parameter (FormPostResponse.ftl)

Which CVE IDs does GHSA-fq9h-c788-fx73 cover?

GHSA-fq9h-c788-fx73 covers the following CVE IDs: CVE-2026-44203. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-fq9h-c788-fx73?

GHSA-fq9h-c788-fx73 has a CVSS v3 base score of 9.3, published by GitHub Security Advisories.

Which products are affected by GHSA-fq9h-c788-fx73?

GHSA-fq9h-c788-fx73 affects 1 product, including: maven/org.openidentityplatform.openam:openam-oauth2:\u003e= 13.0.0, \u003c 16.1.1.

GHSA-fq9h-c788-fx73CriticalCVSS 9.3

OpenAM has pre-auth Reflected XSS in OAuth2 / OIDC response_mode=form_post via state parameter (FormPostResponse.ftl)

Vendor

GitHub Security Advisories

Published

June 22, 2026

Last Modified

June 22, 2026

🔗 CVE IDs covered (1)

CVE-2026-44203 →

📋 Description

Summary

The OAuth 2.0 / OpenID Connect authorization endpoint does not sufficiently sanitize certain user-supplied parameters before incorporating them into the HTML response generated for the form_post response mode. This may allow an attacker to inject content into the rendered page in the context of the OpenAM origin.

🎯 Affected products1

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

🔗 References (3)

https://github.com/OpenIdentityPlatform/OpenAM/security/advisories/GHSA-fq9h-c788-fx73
https://github.com/OpenIdentityPlatform/OpenAM/releases/tag/16.1.1
https://github.com/advisories/GHSA-fq9h-c788-fx73