# CVE-2026-108086: Apache Cocoon XML entity expansion in form processor

Source: https://junglewise.ai/threats/cve-2026-108086-unsupported-when-assigned-improper-restriction-of-recursive  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-20. Updated: 2026-10-20  
License: CC BY 4.0 with a link back

CVE-2026-108086 · Severity: info · Published 2026-10-20

Apache Cocoon is a web application framework that has reached end-of-life and is no longer maintained. A vulnerability in its form processor allows attackers to exploit XML entity expansion attacks, potentially exposing server files or redirecting requests to external systems. Since the project is retired, no patches will be released.

Technologies: [Apache Cocoon](https://junglewise.ai/threats/technologies/apache-cocoon). Vendors: [Apache](https://junglewise.ai/threats/vendors/apache).

## Quick answers

**Is CVE-2026-108086 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-108086 being exploited in the wild.

**How severe is CVE-2026-108086?** Informational severity, published 20 October 2026.

**Which products and versions are affected?** Apache Cocoon all versions.

**Is there a fix for CVE-2026-108086?** No fixed version is recorded yet. Restrict access to Cocoon instances to trusted users only, or migrate to an actively maintained alternative web framework. 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-2026-108086 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-108086?** Check whether you run Apache Cocoon at an affected version. 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


Restrict access to Cocoon instances to trusted users only, or migrate to an actively maintained alternative web framework.

## Technical details

An XML external entity (XXE) expansion vulnerability exists in Apache Cocoon's form processor (fp: component) that improperly restricts recursive entity references in DTDs. This allows attackers to craft malicious XML input that can lead to server-side request forgery (SSRF) and disclosure of sensitive files from the affected server. The project is retired and unmaintained, so no fix will be released.

## Affected products

- Apache Cocoon all versions

## Timeline

- 2026-10-20: disclosed

## References

- [https://lists.apache.org/thread/mt0h1cpjzps76nq6op7714rmnq6pbtht](https://lists.apache.org/thread/mt0h1cpjzps76nq6op7714rmnq6pbtht)

## Related threats

- [Apache Cocoon information disclosure in diagnostic interfaces](https://junglewise.ai/threats/cve-2026-108089-unsupported-when-assigned-exposure-of-sensitive-system)
- [Apache Cocoon cache information disclosure in multi-user applications](https://junglewise.ai/threats/cve-2026-108088-unsupported-when-assigned-use-of-cache-containing-sensitive)
- [Apache Cocoon SQL injection in SQL processor](https://junglewise.ai/threats/cve-2026-108087-unsupported-when-assigned-improper-neutralization-of-special)