Vulnerability · Published Sep 15, 2026 · Assigned by GitHub_M

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

High 7.0

In plain English

A high-severity cross-site scripting in OpenAM from OpenIdentityPlatform. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 49% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)7.0High

Exploit odds (30 days)0.6%top 51.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Open Access Management (OpenAM) is an access management solution. Prior to 16.1.1, certain federation endpoints in a non-default clustered configuration inconsistently encode user-supplied parameters rendered into HTML in the SAML2 cluster cookie-hash redirect path. An unauthenticated attacker can induce a user to follow a crafted request and execute script in the OpenAM origin. This issue is fixed in version 16.1.1.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Maven	org.openidentityplatform.openam:openam-federation-library	16.1.1	GHSA-fhrq-3gmx-p879

Affected products (as reported)

Vendor	Product	Versions
OpenIdentityPlatform	OpenAM	< 16.1.1

Weakness: CWE-79 · Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:L/VI:H/VA:N/SC:L/SI:H/SA:N

References

https://github.com/OpenIdentityPlatform/OpenAM/security/advisories/GHSA-fhrq-3gmx-p879 x_refsource_CONFIRM
https://github.com/OpenIdentityPlatform/OpenAM/commit/2f5e9bf4c28a4c9e97ded6ebd75e4e1ec241c894 x_refsource_MISC
https://github.com/OpenIdentityPlatform/OpenAM/releases/tag/16.1.1 x_refsource_MISC