CVE-2026-44793: OpenAM SAML2 Cluster Cookie-Hash-Redirect Path has Pre-authentication Reflected XSS via `FSUtils.postToTarget`

June 22, 2026

Certain federation endpoints do not consistently apply output encoding when rendering user-supplied parameters into HTML responses. Under a non-default configuration used in some clustered deployments, this inconsistency can result in reflected XSS in the OpenAM origin without authentication.

References

github.com/OpenIdentityPlatform/OpenAM/releases/tag/16.1.1
github.com/OpenIdentityPlatform/OpenAM/security/advisories/GHSA-fhrq-3gmx-p879
github.com/advisories/GHSA-fhrq-3gmx-p879
nvd.nist.gov/vuln/detail/CVE-2026-44793

Code Behaviors & Features

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