OpenAM: Pre-authentication Reflected XSS in SAML2 Cluster Cookie-Hash-Redirect Path via `FSUtils.postToTarget`
Priority LOW 32CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Active
- Attack complexity
- Low
- Attack requirements
- Present
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · High · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-79.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00593 48th percentileScored 2026-11-07
Fix Fixed OpenAM (OpenIdentityPlatform): 16.1.1org.openidentityplatform.openam:openam-federation-library (Maven): 16.1.1
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| OpenIdentityPlatform | OpenAM | before 16.1.1 | 16.1.1 | Patch available | CNA |
| — | org.openidentityplatform.openam:openam-federation-library (Maven) | before 16.1.1 | 16.1.1 | Patch available | GHSA-fhrq-3gmx-p879 |
- OpenAM VendorOpenIdentityPlatform Affected before 16.1.1 Fixed in 16.1.1 Patch available CNA
- org.openidentityplatform.openam:openam-federation-library (Maven) Vendor— Affected before 16.1.1 Fixed in 16.1.1 Patch available GHSA-fhrq-3gmx-p879
Remediation
- Fix · CNA OpenAM (OpenIdentityPlatform) Fixed in 16.1.1
- Fix · GHSA-fhrq-3gmx-p879 org.openidentityplatform.openam:openam-federation-library (Maven) Fixed in 16.1.1 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-44793
- 2026-10-03 Alias added: GHSA-fhrq-3gmx-p879
- 2026-10-28 2 new references · GHSA-fhrq-3gmx-p879
References
More OpenIdentityPlatform vulnerabilities
- TI-2025-20332 OpenDJ Denial of Service (Dos) using alias loop CVSS 4.0HIGH 8.7
- TI-2026-25836 Pre-Authentication Remote Code Execution via `jato.clientSession` Deserialization in OpenAM CVSS 4.0CRITICAL 9.3
- TI-2026-86693 Session token disclosure in OpenAM notification WebSocket CVSS 4.0CRITICAL 10.0
- TI-2026-86692 Authentication bypass in OpenAM SAML login accepts unsigned assertions CVSS 4.0CRITICAL 9.3
- TI-2026-86691 Privilege escalation in OpenAM via self-registration attribute bypass CVSS 4.0CRITICAL 9.3
- TI-2026-86685 Unbounded Java deserialization in OpenAM enables denial of service CVSS 4.0HIGH 8.7
Sources
- CVE-2026-44793 · CVE Program
- CVE-2026-44793 · NVD
- FIRST EPSS
- GHSA-fhrq-3gmx-p879 · GitHub Advisory Database · CC BY 4.0
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