CVE-2026-66256CWE-502insecure-deserialization

CVE-2026-66256

High · published August 13, 2026

CVSS v3.1
7.2
EPSS
1%
Percentile
60.4
In the wild
Unconfirmed
What it is

** 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.

The record
Technical detail
CVSS v3.1
7.2 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00935 · 60.4th percentile
Weakness
CWE-502 · Deserialization of Untrusted Data
Published
2026-08-13T19:19Z
Affected products (1)
ProductVersionsFixed in
apache/shindig≤ 3.0.0—
References (2)
https://lists.apache.org/thread/opgpnhk149614gx6vcy3lvyjnycw8mkh · [email protected]http://www.openwall.com/lists/oss-security/2026/08/13/7 · af854a3a-2127-422b-91ae-364da2661108
EPSS history
Timeline
  • 13 AUG 13:53Z
    Apache Shindig Common, Apache Shindig Social-Api: Remote Code Execution via XStream deserialization (OpenSocial REST API)
    cvelistv5