Critical severityNVD Advisory· Published Jun 22, 2026
OpenAM has pre-auth Reflected XSS in OAuth2 / OIDC response_mode=form_post via state parameter (FormPostResponse.ftl)
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.
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LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
org.openidentityplatform.openam:openam-oauth2Maven | >= 13.0.0, < 16.1.1 | 16.1.1 |
Affected products
1Patches
Vulnerability mechanics
References
3News mentions
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