# CVE-2026-97890: Apache OpenEJB embedded HTTP server session fixation

Source: https://junglewise.ai/threats/cve-2026-97890-the-embedded-http-server-does-not-invalidate-the-previous-session  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-10. Updated: 2026-11-10  
License: CC BY 4.0 with a link back

CVE-2026-97890 · Severity: info · Published 2026-11-10

OpenEJB's built-in HTTP server fails to invalidate old session identifiers when applications create new ones after login, allowing attackers to hijack authenticated user sessions. An attacker who can inject a session cookie into a victim's browser can impersonate that user and access their data or perform actions on their behalf. Migration to TomEE distributions or network access restrictions are recommended.

## Quick answers

**Is CVE-2026-97890 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-97890 being exploited in the wild.

**How severe is CVE-2026-97890?** Informational severity, published 10 November 2026.

**Which products and versions are affected?** OpenEJB.

**Is there a fix for CVE-2026-97890?** No fixed version is recorded yet. Block network access to the embedded HTTP server from untrusted clients, or migrate to Tomcat-based TomEE distributions. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-97890 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-97890?** Check whether you run OpenEJB. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix


Block network access to the embedded HTTP server from untrusted clients, or migrate to Tomcat-based TomEE distributions.

## Technical details

The vulnerability is a session fixation flaw in the embedded HTTP server where old session identifiers remain valid after the application generates a new one during authentication. An attacker with network access can plant a session ID in a victim's browser before login; after the victim authenticates, the old session ID becomes associated with the authenticated session, enabling account hijacking. The advisory recommends blocking untrusted network access or migrating to Tomcat-based distributions.

## Affected products

- OpenEJB

## Timeline

- 2026-11-10: disclosed

## References

- [https://repo.maven.apache.org/maven2](https://repo.maven.apache.org/maven2)
- [https://lists.apache.org/thread/2wx7lvso54j2xp6m7omq12hkcb9tfzjx](https://lists.apache.org/thread/2wx7lvso54j2xp6m7omq12hkcb9tfzjx)