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Vulnerability record · CVE-2026-66256 · published 13 August 2026

CVE-2026-66256: Apache shindig deserialization of untrusted data vulnerability

Apache · Shindig

** 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.

7.2 CVSS 3.1 High EPSS 0.94% · top 40.8% CWE-502 · Deserialization of untrusted data
7.2CVSS 3.1 base score
0.94%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
11 Sep 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://lists.apache.org/thread/opgpnhk149614gx6vcy3lvyjnycw8mkh Mailing ListVendor Advisory
http://www.openwall.com/lists/oss-security/2026/08/13/7 Mailing ListThird Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2026-66256), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.