Answer in brief
CVE-2026-66256 records a Unknown severity vulnerability in Apache Shindig Common, Apache Shindig Social-Api: Remote Code Execution via XStream deserialization (OpenSocial REST API). The current sources do not mark it as known exploited. The current feed maps Apache Software Foundation/Apache Shindig Common (generic), Apache Software Foundation/Apache Shindig Social-Api (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Apache Software Foundation/Apache Shindig Common (generic), Apache Software Foundation/Apache Shindig Social-Api (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Apache Software Foundation/Apache Shindig Commongeneric | 0 | Not reported |
| Apache Software Foundation/Apache Shindig Social-Apigeneric | 0 | Not reported |
Published upstream
Aug 13, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 13, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 13, 2026
** 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.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-66256 records a Unknown severity vulnerability in Apache Shindig Common, Apache Shindig Social-Api: Remote Code Execution via XStream deserialization (OpenSocial REST API). The current sources do not mark it as known exploited. The current feed maps Apache Software Foundation/Apache Shindig Common (generic), Apache Software Foundation/Apache Shindig Social-Api (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Apache Software Foundation/Apache Shindig Common (generic), Apache Software Foundation/Apache Shindig Social-Api (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Apache Software Foundation/Apache Shindig Commongeneric | 0 | Not reported |
| Apache Software Foundation/Apache Shindig Social-Apigeneric | 0 | Not reported |
Published upstream
Aug 13, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 13, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 13, 2026
** 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.
Quoted source text, attributed separately from HOL analysis.