# CVE-2026-45049: OpenAM Session Hijacking via CDSSO

Status: published. Published: 2026-10-29. Updated: 2026-11-04.

Open Access Management (OpenAM) is an access management solution. Prior to 16.1.1, the `Cross-Domain Single Sign-On` (`CDSSO`) servlet allows a logged-in user's raw OpenAM session token to be POSTed to an attacker-controlled URL. An attacker who induces an authenticated victim to visit a crafted URL can receive the session credential and potentially hijack the session. Deployments must have `CDSSO` enabled, as is common in multi-domain deployments, and exploitation is additionally gated on a non-default configuration being absent. This issue is fixed in version 16.1.1.

## Remediation

- fix: org.openidentityplatform.openam:openam-federation (Maven): OSV reports a fixed version 16.1.1. Check the advisory for supported release branches. (source: OSV GHSA-r9pv-5rpp-vm8g) — https://github.com/advisories/GHSA-r9pv-5rpp-vm8g

## Affected products and versions

- OpenIdentityPlatform / OpenAM: < 16.1.1 (affected). Source: CNA: GitHub_M
-  / org.openidentityplatform.openam:openam-federation (org.openidentityplatform.openam:openam-federation): 14.5.2 (affected, Maven); 14.5.3 (affected, Maven); 14.5.4 (affected, Maven); 14.6.1 (affected, Maven); 14.6.2 (affected, Maven); 14.6.3 (affected, Maven); 14.6.4 (affected, Maven); 14.6.5 (affected, Maven); 14.6.6 (affected, Maven); 14.7.0 (affected, Maven); 14.7.1 (affected, Maven); 14.7.2 (affected, Maven); 14.7.3 (affected, Maven); 14.7.4 (affected, Maven); 14.8.1 (affected, Maven); 14.8.2 (affected, Maven); 14.8.3 (affected, Maven); 14.8.4 (affected, Maven); 15.0.0 (affected, Maven); 15.0.1 (affected, Maven); 15.0.2 (affected, Maven); 15.0.3 (affected, Maven); 15.0.4 (affected, Maven); 15.1.0 (affected, Maven); 15.1.1 (affected, Maven); 15.1.2 (affected, Maven); 15.1.3 (affected, Maven); 15.1.4 (affected, Maven); 15.1.5 (affected, Maven); 15.1.6 (affected, Maven); 15.2.0 (affected, Maven); 15.2.1 (affected, Maven); 15.2.2 (affected, Maven); 16.0.1 (affected, Maven); 16.0.2 (affected, Maven); 16.0.3 (affected, Maven); 16.0.4 (affected, Maven); 16.0.5 (affected, Maven); 16.0.6 (affected, Maven); 16.1.0 (affected, Maven); Ecosystem version events: introduced 0; fixed 16.1.1. Source: OSV GHSA-r9pv-5rpp-vm8g

## Severity and prioritization

- CVSS 3.1: 8.3 (high); CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H; source: CNA: GitHub_M

- CISA KEV: No listing in collected sources

- EPSS: 0.33% as of 2026-11-03; percentile 26.45%

- SSVC: exploitation none; automatable no; technical impact total; source ADP: CISA-ADP

- Weaknesses: CWE-201

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/OpenIdentityPlatform/OpenAM/security/advisories/GHSA-r9pv-5rpp-vm8g (CNA: GitHub_M; x_refsource_CONFIRM)

- https://github.com/OpenIdentityPlatform/OpenAM/commit/bda647f8540d8fb28aaaed716914692678c5a0a7 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/OpenIdentityPlatform/OpenAM/releases/tag/16.1.1 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/advisories/GHSA-r9pv-5rpp-vm8g (OSV / GitHub Security Advisories; advisory)

- https://osv.dev/vulnerability/GHSA-r9pv-5rpp-vm8g (OSV / GitHub Security Advisories; osv)

## Provenance

- CNA: GitHub_M: https://www.cve.org/CVERecord?id=CVE-2026-45049; retrieved 2026-11-04; source updated 2026-11-04

- OSV / GitHub Security Advisories: https://osv.dev/vulnerability/GHSA-r9pv-5rpp-vm8g; retrieved 2026-11-04; source updated 2026-10-28

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-45049; retrieved 2026-11-04; source updated Not reported

Revision: e85285be1c2a0004c5eb963c1d97452a2ef3e0227cdc8427870495442ea54647

Canonical: https://y2.dev/cve/CVE-2026-45049

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