What’s Vulnerable › Vulnerabilities

CVE-2025-48976: Apache Commons FileUpload, Apache Commons FileUpload: FileUpload DoS via part headers

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 32.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-06-16 · updated 2026-06-17
• Weakness: CWE-770

Description

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.

Affected products

• Apache Software Foundation Apache Commons FileUpload: from 1.0 before 1.6; 2.0.0-m1, 2.0.0-m1-rc1, 2.0.0-m2, 2.0.0-m2-rc1, 2.0.0-m3, 2.0.0-m3-rc1 — fixed in 1.6

How to fix

Upgrade to a fixed version: Apache Software Foundation Apache Commons FileUpload 1.6. Check the vendor advisory for mitigations.

References

• https://lists.apache.org/thread/fbs3wrr3p67vkjcxogqqqqz45pqtso12
• http://www.openwall.com/lists/oss-security/2025/06/16/4
• https://lists.debian.org/debian-lts-announce/2025/07/msg00008.html
• https://lists.debian.org/debian-lts-announce/2025/07/msg00009.html

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