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HIGH severity

CVE-2023-24998 — commons-fileupload

HIGHFix: apache/commons-fileupload@e20c049

CVE-2023-24998 is a high-severity (CVSS 7.5) CWE-770 vulnerability in commons-fileupload:commons-fileupload. 2 public exploit or proof-of-concept references are indexed, so weaponization risk is real. A fix is available for commons-fileupload:commons-fileupload — see the affected versions and patch details below.

Apache Commons FileUpload, Apache Tomcat: FileUpload DoS with excessive parts

Also known asGHSA-hfrx-6qgj-fp6c
Published
Updated
Affected
13 pkgs
Patched
13 / 13
Exploits
2 known
Exploitation data as of Nov 10, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

  • CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
  • CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2023-24998.

EPSS Exploitation Probability

via FIRST.org ↗
48.8%probability of exploitation in next 30 days
High Risk0.00%
Lower risk than most CVEs99th percentile — riskier than 99% of all scored CVEsHighest risk
29.4%37.4%45.3%53.3%36.4%48.8%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

13 pkgs affected
☕commons-fileupload:commons-fileupload☕org.apache.tomcat:tomcat-coyote☕org.apache.tomcat:tomcat-coyote☕org.apache.tomcat:tomcat-coyote☕org.apache.tomcat:tomcat-coyote☕org.apache.tomcat.embed:tomcat-embed-core☕org.apache.tomcat.embed:tomcat-embed-core☕org.apache.tomcat.embed:tomcat-embed-core+5 more

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 Commons FileUpload before 1.5 does not limit the number of request parts to be processed resulting in the possibility of an attacker triggering a DoS with a malicious upload or series of uploads.

Note that, like all of the file upload limits, the new configuration option (FileUploadBase#setFileCountMax) is not enabled by default and must be explicitly configured.

Affected Packages

13 total 13 fixed
EcosystemPackageVulnerable rangeFix
☕Mavencommons-fileupload:commons-fileuploadall versions1.5commons-fileupload:commons-fileupload:1.5
☕Mavenorg.apache.tomcat:tomcat-coyote≥ 10.1.0-M1&&< 10.1.510.1.5org.apache.tomcat:tomcat-coyote:10.1.5
☕Mavenorg.apache.tomcat:tomcat-coyote≥ 11.0.0-M2&&< 11.0.0-M511.0.0-M5org.apache.tomcat:tomcat-coyote:11.0.0-M5
☕Mavenorg.apache.tomcat:tomcat-coyote≥ 8.5.85&&< 8.5.888.5.88org.apache.tomcat:tomcat-coyote:8.5.88
☕Mavenorg.apache.tomcat:tomcat-coyote≥ 9.0.0-M1&&< 9.0.719.0.71org.apache.tomcat:tomcat-coyote:9.0.71
☕Mavenorg.apache.tomcat.embed:tomcat-embed-core≥ 10.1.0-M1&&< 10.1.510.1.5org.apache.tomcat.embed:tomcat-embed-core:10.1.5

Affected Products

2 products · 4 configurations
Application
commons fileuploadapache
≥ 1.0 && < 1.5
1 version
1.0
OS
debian linuxdebian
2 versions
9.011.0
Exploits & PoCs
2

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

Apache Commons FileUpload before 1.5 does not limit the number of reques…

github.comGithubMar 2023

Detection & mitigation playbook

Open-source dependency

  1. Detect

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

  2. Fix

    Update commons-fileupload:commons-fileupload to 1.5 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2023-24998 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.

Fixing This On Your OS

If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.

Red HatModerate
ProductFixed inAdvisory
JWS 5.7.4 releasetomcatRHSA-2023:4910
OCP-Tools-4.13-RHEL-8jenkins-0:2.387.3.1684911776-3.el8RHSA-2023:3299
Red Hat Enterprise Linux 8tomcat-1:9.0.62-27.el8_9RHSA-2023:7065
Red Hat Enterprise Linux 8.8 Extended Update Supporttomcat-1:9.0.87-1.el8_8.2RHSA-2024:3814
Red Hat Enterprise Linux 9tomcat-1:9.0.62-37.el9_3RHSA-2023:6570
Red Hat JBoss Web Server 5.7 on RHEL 7jws5-tomcat-0:9.0.62-15.redhat_00013.1.el7jwsRHSA-2023:4909
RHINT Camel-Springboot 3.20.1tomcatRHSA-2023:2100
RHPAM 7.13.4 asyncsee advisoryRHSA-2023:4983

Frequently Asked Questions

Apache Commons FileUpload before 1.5 does not limit the number of request parts to be processed resulting in the possibility of an attacker triggering a DoS with a malicious upload or series of uploads. Note that, like all of the file upload limits, the new configuration option (FileUploadBase#setFileCountMax) is not enabled by default and must be explicitly configured.
O3 Security · Impact-Aware SCA

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CVE-2023-24998: commons-fileupload DoS — Fixed in 1.5