CVE-2025-48976
HIGHCVE-2025-48976 is a high-severity (CVSS 7.5) CWE-770 vulnerability in commons-fileupload:commons-fileupload. O3 Security confirms whether CVE-2025-48976 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
Apache Commons FileUpload, Apache Commons FileUpload: FileUpload DoS via part headers
Blast Radius
commons-fileupload:commons-fileupload☕org.apache.commons:commons-fileupload2-coreReal-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
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 Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| ☕Maven | commons-fileupload:commons-fileupload | ≥ 1.0&&< 1.6.0 | 1.6.0 |
| ☕Maven | org.apache.commons:commons-fileupload2-core | ≥ 2.0.0-M1&&< 2.0.0-M4 | 2.0.0-M4 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for commons-fileupload:commons-fileupload. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update commons-fileupload:commons-fileupload to 1.6.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2025-48976 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether CVE-2025-48976 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to CVE-2025-48976. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is CVE-2025-48976 in your dependencies?
O3 detects CVE-2025-48976 across Maven dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.