CVE-2026-73631

MediumCVSS 4.3

Published: 15/08/2026(UTC)Updated: 18/08/2026(UTC)Translated: 15/08/2026(UTC)NVD NIST

Exploitation Probability (EPSS)

Low risk

0.23%

14th percentile - higher than 14% of all known CVEs

Summary

A vulnerability in the JSON plugin of Apache Struts allows per-request parsing state to be shared across concurrent requests, potentially exposing data from one request to another and not enforcing configured parsing limits. Populating actions from JSON request bodies is not enabled by default, so applications not using the JSON plugin are unaffected.

Risk Assessment

The risk involves potential data leakage between requests and possible bypass of limits, which could lead to unauthorized information access or system overload.

Recommendation

Upgrade Apache Struts to version 7.3.0, which fixes the issue. If you do not use the JSON plugin, no further action is required.

Original NVD description (English source)

Exposure of data element to wrong session vulnerability in the JSON plugin of Apache Struts. Per-request parsing state could be shared across concurrent requests, allowing data associated with one request to become observable in another, and configured parsing limits not to be enforced as intended. Populating actions from a JSON request body is not enabled by default; applications that do not use the JSON plugin 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.