7.5

CVE-2026-73633: apache software foundation apache struts Uncontrolled Resource Consumption

CVSS: 7.5v3.1HighAnalyzed
Published 14-08-2026Last modified 14-08-2026
Open JSON

Vulnerability summary

CVE-2026-73633 is a high (CVSS 7.5) Uncontrolled Resource Consumption vulnerability in apache software foundation apache struts. EPSS estimates a 0.70% chance of exploitation in the next 30 days, higher than 52.2% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.70%
0%100%
Low · +0.10 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 14-08-2026
    PublishedVulnerability first disclosed.
  2. 14-08-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.70%

Chance of exploitation in the next 30 days

Percentile

52%

Versus all other CVEs

30-day change

+0.10 pp

From 0.60% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.70%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Apache1 product
  • struts≥ 2.1.8, ≤ 2.3.37 | ≥ 2.5.0, ≤ 2.5.33 | ≥ 6.0.0, < 6.11.0 | ≥ 7.0.0, < 7.3.0
Apache software foundation1 product
  • apache struts≥ 2.1.8, ≤ 2.3.37 | ≥ 2.5.0, ≤ 2.5.33 | ≥ 6.0.0, ≤ 6.10.0 | ≥ 7.0.0, ≤ 7.2.1

2 vendors · 2 products

References

1 links