CVE-2026-3260

Severity
7.5HIGH
EPSS
0.6%
top 31.27%
CISA KEV
Not in KEV
Exploit
No known exploits
Timeline
PublishedMar 24

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).

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 2.2 | Impact: 3.6

Affected Packages8 packages

Also affects: Enterprise Linux 10.0, 8.0, 9.0

🔴Vulnerability Details

4
OSV
Undertow: Denial of Service via Multipart/Form-Data Parsing on HTTP GET Requests2026-03-24
OSV
CVE-2026-3260: A flaw was found in Undertow2026-03-24
CVEList
Undertow: undertow: denial of service due to premature multipart/form-data parsing in get requests2026-03-24
GHSA
Undertow: Denial of Service via Multipart/Form-Data Parsing on HTTP GET Requests2026-03-24

📋Vendor Advisories

2
Red Hat
undertow: Undertow: Denial of Service due to premature multipart/form-data parsing in GET requests2026-03-24
Debian
CVE-2026-3260: undertow - A flaw was found in Undertow. A remote attacker could exploit this vulnerability...2026

🕵️Threat Intelligence

1
Wiz
CVE-2026-3260 Impact, Exploitability, and Mitigation Steps | Wiz