# CVE-2026-44203

## Summary

- **CVE ID:** CVE-2026-44203
- **Severity:** HIGH
- **CVSS Score:** 8.3 (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
- **Published:** Sep 15, 2026
- **Last Modified:** Sep 15, 2026

## Description

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.

## Affected Products

- OpenIdentityPlatform — OpenAM (< 16.1.1)

## References

- [CNA](https://github.com/OpenIdentityPlatform/OpenAM/security/advisories/GHSA-fq9h-c788-fx73)
- [CNA](https://github.com/OpenIdentityPlatform/OpenAM/commit/078bd4754905f5130eaa7bbe45f958eaeb7fd0d7)
- [CNA](https://github.com/OpenIdentityPlatform/OpenAM/releases/tag/16.1.1)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.47%
- **EPSS Percentile:** 39.3

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-17._