CVE-2026-3260
Undertow: Denial of Service via Multipart/Form-Data Parsing on HTTP GET Requests
5.9
MEDIUM
CVSS 3.1
EPSS 0.49%
Description
A flaw was found in Undertow. A remote attacker could exploit this vulnerability by sending an HTTP GET request containing multipart/form-data content. If the underlying application processes parameters using methods like `getParameterMap()`, the server prematurely parses and stores this content to disk. This could lead to resource exhaustion, potentially resulting in a Denial of Service (DoS).
How to fix CVE-2026-3260
To remediate CVE-2026-3260, upgrade the affected package to a fixed version below.
- —no fix listed
- —upgrade to 2.4.0.Beta1 or later
Is CVE-2026-3260 being exploited?
Low — EPSS is 0.5%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0
- from 0, < 2.4.0.Beta1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |