CVE-2026-66256
Received Received - Intake

Deserialization of Untrusted Data in Apache Shindig

Publication date: 2026-08-13

Last updated on: 2026-08-13

Assigner: Apache Software Foundation

Description
** 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.

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Meta Information

Published
2026-08-13
Last Modified
2026-08-13
Generated
2026-08-13
AI Q&A
2026-08-13
EPSS Evaluated
N/A
NVD
CVE-2026-66256
EUVD
EUVD-2026-57918

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
apache shindig *

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-502 The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

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Executive Summary

CVE-2026-66256 is a deserialization of untrusted data vulnerability in Apache Shindig, specifically in the Common and Social-Api components. It allows attackers with access to the Shindig REST API to send specially-crafted requests that trigger arbitrary code execution on the server.

Detection Guidance

Since Apache Shindig is no longer supported, detection primarily involves monitoring for unusual activity in the Shindig REST API. Check server logs for suspicious requests targeting the Common or Social-Api components. Look for deserialization-related errors or unexpected code execution traces.

Impact Analysis

If you use Apache Shindig, attackers with API access could execute arbitrary code on your server, potentially leading to data breaches, system compromise, or unauthorized access. Since no fix is available, mitigation requires restricting API access to trusted users or migrating to an alternative solution.

Compliance Impact

This vulnerability could lead to unauthorized data access or exfiltration, violating GDPR (data protection) and HIPAA (health data privacy) requirements. Non-compliance risks include fines, legal action, and reputational damage due to potential breaches.

Mitigation Strategies

Immediately restrict access to the Shindig REST API to trusted users only. If possible, disable the API entirely. Consider migrating to an alternative solution as no official fix will be released due to the project being retired.

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