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MEDIUM severity

CVE-2016-5004 — xmlrpc-common

MEDIUM

CVE-2016-5004 is a medium-severity (CVSS 6.5) Uncontrolled Resource Consumption vulnerability in org.apache.xmlrpc:xmlrpc-common. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. The records list no fixed version yet; check the vendor advisory below and apply the mitigations in the meantime.

ws-xmlrpc DoS Vulnerability

Published
Updated
Affected
1 pkg
Patched
See advisory
Exploits
1 known
Exploitation data as of Nov 3, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
7.7%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs95th percentile — riskier than 95% of all scored CVEsHighest risk
0.00%3.25%6.50%9.75%1.1%7.7%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

1 pkg affected
☕org.apache.xmlrpc:xmlrpc-common

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

The Content-Encoding HTTP header feature in ws-xmlrpc 3.1.3 as used in Apache Archiva allows remote attackers to cause a denial of service (resource consumption) by decompressing a large file containing zeroes.

Affected Packages

1 total
EcosystemPackageVulnerable rangeFix
☕Mavenorg.apache.xmlrpc:xmlrpc-commonall versionsNo fix

Affected Products

1 product · 1 configurations
Application
ws-xmlrpcapache
1 version
3.1.3
Exploits & PoCs
1

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

The Content-Encoding HTTP header feature in ws-xmlrpc 3.1.3 as used in A…

github.comNVDJun 2017

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.xmlrpc:xmlrpc-common, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Remediation status

    The records we use list no patched version of org.apache.xmlrpc:xmlrpc-common for CVE-2016-5004. Check the maintainer's advisory, and where your build allows, override or pin the dependency away from the vulnerable range.

  3. Mitigate without a patch

    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

The Content-Encoding HTTP header feature in ws-xmlrpc 3.1.3 as used in Apache Archiva allows remote attackers to cause a denial of service (resource consumption) by decompressing a large file containing zeroes.
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CVE-2016-5004: xmlrpc-common DoS (Medium 6.5)