What is CVE-2026-73632?

CVE-2026-73632 is a medium-severity vulnerability in Apache Struts, classified under CWE-567. CVSS score: 4.3/10. Published 2026-08-15.

How severe is CVE-2026-73632?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Vulnerability in Apache Struts

CVE-2026-73632

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.

Published 2026-08-15 · last modified 2026-08-18.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.004 (28.9th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 29th percentile — 28.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001

Affected products

Apache Struts — versions 7.2.1
Apache Software Foundation Struts — versions 7.2.1

Weakness classification (CWE)

CWE-567

References

cwiki.apache.org/confluence/display/WW/S2-071 (vendor-advisory, Mitigation, Vendor Advisory)

Frequently asked questions

What is CVE-2026-73632?: CVE-2026-73632 is a medium-severity vulnerability in Apache Struts, classified under CWE-567. CVSS score: 4.3/10. Published 2026-08-15.
How severe is CVE-2026-73632?: Medium severity. CVSS v3 base score is 4.3 out of 10.