Bug#1134949: undertow: CVE-2026-3260

[Moritz Mühlenhoff]

Source: undertow
X-Debbugs-CC: team at security.debian.org
Severity: important
Tags: security

Hi,

The following vulnerability was published for undertow.

CVE-2026-3260[0]:
| 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).

https://bugzilla.redhat.com/show_bug.cgi?id=2443010


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2026-3260
    https://www.cve.org/CVERecord?id=CVE-2026-3260

Please adjust the affected versions in the BTS as needed.