CVE-2026-73632: Apache Struts: Shared serialization state in the JSON plugin

Published Aug 15, 2026

Updated

Exposure of data element to wrong session vulnerability in the JSON plugin of Apache Struts. Per-response serialization state could be shared across concurrent requests, allowing response content associated with one request to become observable in another. Only the SMD / JSON-RPC handling of the JSON interceptor is affected, which is not enabled by default; applications using the json result type are not affected.

This issue affects Apache Struts: 7.2.1.

Users are recommended to upgrade to version 7.3.0, which fixes the issue.

Affected Software

1 affected component

Apache Struts=7.2.1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

Upgrade
Upgrade Apache Struts to a version that resolves this vulnerability.
Fixed in 7.3.0

Event History

Aug 15, 2026

CVE Published

via MITRE·10:38 AM

Data Sourced

via MITRE·10:38 AM

DescriptionWeakness

Frequently Asked Questions

What is the severity of CVE-2026-73632?

CVE-2026-73632 has been assigned a risk score of 27, indicating a significant level of severity.

How do I fix CVE-2026-73632?

To mitigate CVE-2026-73632, update to the latest version of Apache Struts where the JSON plugin vulnerability has been addressed.

What software is affected by CVE-2026-73632?

CVE-2026-73632 specifically affects Apache Struts implementations that use the JSON plugin.

What can attackers do with CVE-2026-73632?

Attackers can exploit CVE-2026-73632 to access sensitive response content from one request in another concurrent session.

When was CVE-2026-73632 published?

CVE-2026-73632 was published on August 15, 2026.