Apache Commons FileUpload DoS via Unbounded Multipart Header Allocation
CVE-2025-48976 Published on June 16, 2025
Apache Commons FileUpload, Apache Commons FileUpload: FileUpload DoS via part headers
Allocation of resources for multipart headers with insufficient limits enabled a DoS vulnerability in Apache Commons FileUpload.
This issue affects Apache Commons FileUpload: from 1.0 before 1.6; from 2.0.0-M1 before 2.0.0-M4.
Users are recommended to upgrade to versions 1.6 or 2.0.0-M4, which fix the issue.
Vulnerability Analysis
CVE-2025-48976 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.
Weakness Type
Allocation of Resources Without Limits or Throttling
The software allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor.
Products Associated with CVE-2025-48976
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Affected Versions
Apache Software Foundation Apache Commons FileUpload:- Version 1.0 and below 1.6 is affected.
- Version 2.0.0-M1 and below 2.0.0-M4 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.