Apache Struts: Unbounded read of a JSON request body
Published Aug 14, 2026
7.5
HIGHCVSS 3.1
EPSS 0.70%
Description
Uncontrolled resource consumption vulnerability in the JSON plugin of Apache Struts. When an application is configured to populate actions from a JSON request body, the plugin reads that body into memory without bounding how much it will accept, so a single request can exhaust the heap and deny service to other users. The plugin's configurable JSON input length limit does not bound this read. The JSON plugin is an optional component; applications that do not use it, or use it without enabling JSON request-body handling, are not affected.
This issue affects Apache Struts: from 2.1.8 through 2.3.37, from 2.5.0 through 2.5.33, from 6.0.0 through 6.10.0, from 7.0.0 through 7.2.1.
Users are recommended to upgrade to version 6.11.0 or 7.3.0, which fixes the issue.
Affected products
-
- Version 2.1.8StatusaffectedConstraints<=2.3.37
- Version 2.5.0StatusaffectedConstraints<=2.5.33
- Version 6.0.0StatusaffectedConstraints<=6.10.0
- Version 7.0.0StatusaffectedConstraints<=7.2.1
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Apache Software Foundation | Apache Struts | unaffected |
|
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
YesTechnical Impact
PartialDecision
n/aAssessed Aug 14, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
Aug–Oct 2026- EPSS v5
Percentile over time
- EPSS v5
Table of values (2 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.70% (0.00698) | 51.32th | v5 (v2026.06.15) |
| Aug 15, 2026 | 0.32% (0.00324) | 25.25th | v5 (v2026.06.15) |
References (1)
- https://cwiki.apache.org/confluence/display/WW/S2-072 vendor-advisoryVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| https://cwiki.apache.org/confluence/display/WW/S2-072 | vendor-advisoryVendor Advisory |
Change history (0)
No recorded changes yet.