Apache Cocoon Form Processor server-side request forgery

Summaryinfo

A vulnerability described as critical has been identified in Apache Cocoon. Affected by this issue is some unknown functionality of the component Form Processor. The manipulation results in server-side request forgery. This vulnerability only affects products that are no longer supported by the maintainer. This vulnerability is reported as CVE-2026-108086. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability, which was classified as critical, was found in Apache Cocoon (unknown version). Affected is an unknown code block of the component Form Processor. The manipulation with an unknown input leads to a server-side request forgery vulnerability. CWE is classifying the issue as CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

** UNSUPPORTED WHEN ASSIGNED ** Improper restriction of recursive entity references in DTDs ('XML entity expansion') vulnerability in Apache Cocoon. This issue affects Apache Cocoon: all versions. XEE in the fp: form processor could lead to SSRF, including exposing files from the server to an untrusted external system As this project is retired, we do not plan to release a version that fixes this issue. Users are recommended to find an alternative or restrict access to the instance to trusted users. NOTE: This vulnerability only affects products that are no longer supported by the maintainer.

The advisory is available at lists.apache.org. This vulnerability is traded as CVE-2026-108086 since 10/09/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $5k-$25k at the moment (estimation calculated on 10/20/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• Apache

Name

• Cocoon

License

• open-source

Support

• end of life

Website

• Vendor: https://www.apache.org/

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