Apache Struts 2 vulnerable to resource exhaustion

unknownCVE-2026-73635

Apache Struts 2 provided by The Apache Software Foundation contains a resource exhaustion vulnerability.

CSIRTS triage

vendor: Apache product: Struts 2 Denial of service

What: Resource exhaustion vulnerability in Apache Struts 2 allowing denial of service.
Who is affected: Deployments running Apache Struts 2.
Urgency: Moderate — resource exhaustion is lower impact than code execution, and no active exploitation reported.
Action: Apply available patches for Apache Struts 2 when released.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: JVN (Japan Vulnerability Notes) (JP · national-cert · site)
Severity: unknown
Published: 2026-08-25
Exploitation: Not in CISA KEV at last sync

Original advisory: https://jvn.jp/en/jp/JVN08517956/

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-736350.45% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 37% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-73635	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for Apache Struts

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

medium[NEW] [medium] Apache Struts: Multiple vulnerabilitiescert-bund · 2026-08-17
highCVE-2026-73635: Allocation of resources without limits or throttling vulnerability in Apache Struts. When no f…nvd · 2026-08-15
highCVE-2026-73634: Uncontrolled resource consumption vulnerability in Apache Struts. An application that exposes …nvd · 2026-08-15
mediumCVE-2026-73632: Exposure of data element to wrong session vulnerability in the JSON plugin of Apache Struts. P…nvd · 2026-08-15
mediumCVE-2026-73631: Exposure of data element to wrong session vulnerability in the JSON plugin of Apache Struts. P…nvd · 2026-08-15
highCVE-2026-73633: Uncontrolled resource consumption vulnerability in the JSON plugin of Apache Struts. When an a…nvd · 2026-08-14