high · 8.3 Patched

OpenAM Unauthenticated Session Hijacking via Information Exposure in CDCServlet

CVE-2026-45049 · GHSA-r9pv-5rpp-vm8g · EUVD-2026-113394 · published 23 Jun 2026

How serious is it

  • Severity: high, CVSS score 8.3 out of 10.
  • No exploit prediction (EPSS) score yet.
  • Not on the CISA list of exploited vulnerabilities.
  • No public exploit in Exploit-DB.

Is your app affected by CVE-2026-45049?

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Who is affected

  • org.openidentityplatform.openam:openam-federation (Maven) <= 16.0.6

How to check

  1. Look for org.openidentityplatform.openam:openam-federation in your lockfile and compare its version with the range above.
  2. Or paste your lockfile into the checker: it lists every package with a known vulnerability, this one included.

How to fix

Copies a prompt for Claude Code, Cursor or Codex: it checks your lockfiles for this and upgrades it.
  1. Upgrade org.openidentityplatform.openam:openam-federation to 16.1.1 or later, commit the lockfile and redeploy.
  2. If a vulnerable version was live, check your logs and rotate the secrets that server could read.

The advisory

## Summary **Description** An Information Exposure Through Sent Data (CWE-201) issue in OpenAM's 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. This impacts OpenAM Community Edition through version 16.0.6. This issue was patched in version 16.1.1. An attacker who can induce a logged-in victim to visit a crafted URL may receive the victim's session credential, which could enable session hijacking. ## Impact OpenAM deployments through version 16.0.6 that have CDSSO enabled are potentially affected. The CDSSO component is commonly enabled in multi-domain deployments. Exploitation requires user interaction — an authenticated user must be induced to visit an attacker-crafted URL — and is further gated on a non-default configuration being absent. ## Patch This has been patched in OpenAM Community Edition version 16.1.1. Users are encouraged to update to the latest release.

Check your whole app

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References

Merged from GitHub Advisory Database, OSV, ENISA EUVD. Last updated 30 Oct 2026. All vulnerabilities · RSS · JSON

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