Vulnerability · Published Aug 15, 2026 · Assigned by apache

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

Medium 4.3

In plain English

A medium-severity security flaw in Apache Struts from Apache Software Foundation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 32% of all known vulnerabilities).

Severity (CVSS 3.1)4.3Medium

Exploit odds (30 days)0.4%top 68.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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 products (as reported)

Vendor	Product	Versions
Apache Software Foundation	Apache Struts	7.2.1

Weakness: CWE-567 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

References

https://cwiki.apache.org/confluence/display/WW/S2-071 vendor-advisory