CVE-2026-44793: Openam federation library Cross-Site Scripting Vulnerability

LOW
Advisory Identifier: GHSA-fhrq-3gmx-p879
Share
CWE-79
Published
Advisory Summary

CVE-2026-44793 is a LOW cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Openam federation library libraries in the Maven ecosystem. The issue involves openam saml2 cluster cookie-hash-redirect path has pre-authentication reflected xss via `fsutils.posttotarget`. Remediation is available by upgrading affected packages to version 16.1.1.

CVE-2026-44793 at a Glance

CVE Identifier CVE-2026-44793
GHSA Identifier GHSA-fhrq-3gmx-p879
Severity LOW
CVSS v3.1 Base Score N/A
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product Openam federation library
Package Ecosystem Maven
Published Date
Last Updated

How to Fix CVE-2026-44793

To remediate this vulnerability, upgrade all affected Openam federation library dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

org.openidentityplatform.openam:openam-federation-library fixed: 16.1.1 
<dependency>
    <groupId>org.openidentityplatform.openam</groupId>
    <artifactId>openam-federation-library</artifactId>
    <version>16.1.1</version>
</dependency>
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree -Dincludes=org.openidentityplatform.openam

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2026-44793, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=org.openidentityplatform.openam

Analyze the terminal output to locate any version of Openam federation library in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 16.1.1), your application is affected.

Note: The mvn dependency:tree -Dincludes=org.openidentityplatform.openam command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'), where the product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. In Openam federation library, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

## Summary 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.

CVE-2026-44793 Affected Openam federation library Versions

1 component(s)
Fixed Versions:
16.1.1
Product / Package Ecosystem Affected Versions Fixed Version
org.openidentityplatform.openam:openam-federation-library
maven/org.openidentityplatform.openam/openam-federation-library
Maven
< 16.1.1
16.1.1

References

GitHub Advisory / Wiki ADVISORY
https://github.com/OpenIdentityPlatform/OpenAM/security/advisories/GHSA-fhrq-3gmx-p879
Openam federation library Source Repository REPOSITORY
https://github.com/OpenIdentityPlatform/OpenAM
Openam federation library Release RELEASE
https://github.com/OpenIdentityPlatform/OpenAM/releases/tag/16.1.1

Frequently Asked Questions

What is CVE-2026-44793?
CVE-2026-44793 is a security vulnerability in Openam federation library involving OpenAM SAML2 Cluster Cookie-Hash-Redirect Path has Pre-authentication Reflected XSS via `FSUtils.postToTarget` under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Openam federation library versions are affected?
Affected versions include releases prior to 16.1.1 across affected packages: org.openidentityplatform.openam:openam-federation-library.
What version fixes CVE-2026-44793?
Upgrading to 16.1.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is openam-federation-library affected?
Yes, org.openidentityplatform.openam:openam-federation-library is affected in releases prior to 16.1.1. Upgrade your dependency to 16.1.1 or later.
What CWE is associated with CVE-2026-44793?
CVE-2026-44793 is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.).
How can I check Maven dependencies for CVE-2026-44793?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=org.openidentityplatform.openam'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-fhrq-3gmx-p879",
  "modified" : "2026-06-22T20:39:06Z",
  "published" : "2026-06-22T20:39:06Z",
  "aliases" : [ "CVE-2026-44793" ],
  "summary" : "OpenAM SAML2 Cluster Cookie-Hash-Redirect Path has Pre-authentication Reflected XSS via `FSUtils.postToTarget`",
  "details" : "## Summary\n\nCertain 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.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.openidentityplatform.openam:openam-federation-library"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "16.1.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/OpenIdentityPlatform/OpenAM/security/advisories/GHSA-fhrq-3gmx-p879"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/OpenIdentityPlatform/OpenAM"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/OpenIdentityPlatform/OpenAM/releases/tag/16.1.1"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "LOW",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-06-22T20:39:06Z",
    "nvd_published_at" : null
  }
}