Bug 2443010 (CVE-2026-3260)

Summary: CVE-2026-3260 undertow: Undertow: Denial of Service due to premature multipart/form-data parsing in GET requests
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: abrianik, aschwart, asoldano, bbaranow, bmaxwell, boliveir, brian.stansberry, bstansbe, darran.lofthouse, dhanak, dlofthou, dosoudil, drosa, fjuma, fmariani, ggrzybek, gmalinko, ibek, istudens, ivassile, iweiss, janstey, jrokos, kverlaen, mnovotny, mosmerov, mposolda, msvehla, nwallace, parichar, pberan, pdelbell, pesilva, pjindal, pmackay, rmartinc, rstancel, rstepani, sausingh, security-response-team, smaestri, ssilvert, sthorger, tasato, tcunning, thjenkin, tom.jenkinson, vdosoudi, vmuzikar, yfang
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: ---
Doc Text:
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).
Story Points: ---
Clone Of: Environment:
Last Closed: Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-02-26 14:27:15 UTC
A vulnerability was identified in Undertow (as used in Wildfly) where the server prematurely parses and stores multipart/form-data content to the disk when receiving an HTTP GET request, provided the underlying application (e.g., JSF) invokes parameter-parsing methods like getParameterMap().