CVE-2026-66256: Apache Shindig

High severity, CVSS 7.2. EPSS: 0.9% chance of exploitation in the next 30 days.

** UNSUPPORTED WHEN ASSIGNED ** Deserialization of Untrusted Data vulnerability in Apache Shindig. This issue affects Apache Shindig: all versions. Users with access to the Shindig REST API can send specially-crafted requests to trigger arbitrary code execution on the server. 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.

Affected products

• Apache Shindig: up to and including 3.0.0

Published 2026-08-13. Last modified 2026-09-11.