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MEDIUM severity

CVE-2016-3093 — struts2-core

MEDIUM

CVE-2016-3093 is a medium-severity (CVSS 5.3) Improper Input Validation vulnerability in org.apache.struts:struts2-core. A fix is available for org.apache.struts:struts2-core — see the affected versions and patch details below.

Denial of service in Apache Struts

Also known asGHSA-383p-xqxx-rrmp
Published
Updated
Affected
2 pkgs
Patched
2 / 2
Exploits
None indexed
Exploitation data as of Nov 2, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
8.4%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs95th percentile — riskier than 95% of all scored CVEsHighest risk
3.34%6.41%9.48%12.5%5.1%8.4%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

2 pkgs affected
☕org.apache.struts:struts2-core☕ognl:ognl

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

Description

Apache Struts 2.0.0 through 2.3.24.1 does not properly cache method references when used with OGNL before 3.0.12, which allows remote attackers to cause a denial of service (block access to a web site) via unspecified vectors.

Affected Packages

2 total 2 fixed
EcosystemPackageVulnerable rangeFix
☕Mavenorg.apache.struts:struts2-core≥ 2.0.0&&< 2.3.24.32.3.24.3org.apache.struts:struts2-core:2.3.24.3
☕Mavenognl:ognlall versions3.0.12ognl:ognl:3.0.12

Affected Products

2 products · 56 configurations
Application
strutsapache
55 versions
2.0.02.0.12.0.22.0.32.0.42.0.52.0.62.0.72.0.82.0.92.0.102.0.11
Application
ognlognl_project
≤ 3.0.11
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.apache.struts:struts2-core, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update org.apache.struts:struts2-core to 2.3.24.3 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2016-3093 is resolved across your whole dependency graph.

  3. Workarounds

    Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service.

Frequently Asked Questions

Apache Struts 2.0.0 through 2.3.24.1 does not properly cache method references when used with OGNL before 3.0.12, which allows remote attackers to cause a denial of service (block access to a web site) via unspecified vectors.
O3 Security · Impact-Aware SCA

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CVE-2016-3093: struts2-core DoS — Fixed in 2.3.24.3